refactor: rename project uatu -> sanderling (#24)

* refactor: rename Go module path uatu -> sanderling

Module path github.com/priyanshujain/uatu -> github.com/priyanshujain/sanderling,
including all imports and the proto go_package option. Generated .pb.go files
rewritten in-place; safe to regenerate with protoc later.

* chore(proto): regenerate driverpb after module path rename

The previous sed-based module rename corrupted the embedded descriptor
byte lengths. buf generate rewrites them cleanly.

* refactor: rename CLI binary uatu -> sanderling

Updates Makefile target + UATU_BIN var, .goreleaser project/build IDs,
.gitignore comment, and all user-facing strings in the CLI help text,
error messages, and tests. Binary is now bin/sanderling.

* refactor(sdk): rename Kotlin package dev.uatu.sdk -> dev.sanderling.sdk

Moves sdk/android/src/{main,test}/kotlin/dev/uatu -> dev/sanderling and
rewrites package declarations, imports, and the Gradle namespace. Class
names (Uatu, UatuRuntime) are renamed in a follow-up commit.

* refactor(sidecar): rename Kotlin package dev.uatu.sidecar -> dev.sanderling.sidecar

Moves sidecar/src/{main,test}/kotlin/dev/uatu -> dev/sanderling and
rewrites package declarations, imports, and the application mainClass.

* refactor: rename Uatu API surface -> Sanderling

- Kotlin: Uatu -> Sanderling, UatuRuntime -> SanderlingRuntime (+ files).
- JS host binding: globalThis.__uatu__ -> __sanderling__ (Go verifier,
  spec-api, tests).
- TS interface: UatuRuntime -> SanderlingRuntime; internal tags
  __uatuFormula / __uatuActionGenerator -> __sanderling* variants.
- Go trace: UatuVersion field + uatu_version JSON tag renamed.
- Socket naming: uatu-agent / uatu-agent-reader -> sanderling-agent*.
- Sample app, docs, inline-JS test strings updated to match.

* refactor(examples): rename examples/folio/uatu -> examples/folio/sanderling

Renames the example spec directory; updates justfile paths + gitignore
entries accordingly. Package.json name/description and @uatu/spec
dependency are renamed in the npm + docs commits.

* chore(build): rename gradle property + rootProject.name uatu -> sanderling

- Renames the uatu.version gradle property and all its -P references in
  Makefile, build.gradle.kts files, and .github/workflows/release.yml.
- settings.gradle.kts rootProject.name = "sanderling".
- Renames .env.local.example header + release-cli workflow job name.

* refactor(proto): rename proto package uatu.driver.v1 -> sanderling.driver.v1

Updates the proto package and java_package, regenerates driver.pb.go +
driver_grpc.pb.go, rewrites Kotlin imports and the gRPC ServiceName
assertion in driver_test.go.

* refactor: rename npm package @uatu/spec -> @sanderling/spec

Renames package name in pkg/spec-api/package.json + lockfile, all
consumer imports (examples/folio spec, testdata, verifier tests), the
esbuild alias in cmd/sanderling/test_run.go, and related doc references.

* docs: rename uatu -> sanderling in README, docs, and URLs

- README + docs/{manual,development}/*: narrative + GitHub + Pages URLs.
- POM + npm package.json repo/homepage/bugs URLs.
- .gitignore + embed_stub + Makefile-comment references updated to
  'make sanderling'.
- Minor narrative comments in cmd/sanderling/test_run.go and
  internal/inspect/server.go.

* refactor: rename remaining internal uatu strings -> sanderling

- SANDERLING_TEST_PHONE/OTP env vars (cmd + bundler tests).
- sanderling-sidecar runtime tmp dir + extracted JAR filename.
- Inspect web UI: @sanderling/inspect-web package, title, theme
  localStorage key, RunList empty-state copy, uatu_version TS field.
- Sample app storage key sanderling.ledger.v1.
- Test data: sanderling_test AVD name + com.example.sanderling_test.
- Release docs tarball name template.

Makefile

@@ -9,7 +9,7 @@ GO_PACKAGES := ./...
 SIDECAR_JAR := sidecar/build/libs/sidecar-all.jar
 SIDECAR_EMBED := internal/sidecar/assets/sidecar-all.jar
 SDK_AAR := sdk/android/build/outputs/aar/sdk-android-release.aar
-UATU_BIN := bin/uatu
+SANDERLING_BIN := bin/sanderling
 
 DOCS_SRC := $(shell find docs -type f -name '*.md' -not -path 'docs/_*')
 DOCS_OUT := $(patsubst docs/%.md,build/site/%.html,$(DOCS_SRC))
@@ -18,7 +18,7 @@ DOCS_TEMPLATE := docs/_template/page.html
 INSPECT_DIST := internal/inspect/dist
 WEB_DIST := web/dist
 
-.PHONY: bootstrap proto sidecar sdk-android sdk-android-publish uatu install test test-go test-kotlin test-spec-api web-typecheck web-build web-dev inspect-dev docs clean release-cli release-android-local release-npm-dry
+.PHONY: bootstrap proto sidecar sdk-android sdk-android-publish sanderling install test test-go test-kotlin test-spec-api web-typecheck web-build web-dev inspect-dev docs clean release-cli release-android-local release-npm-dry
 
 bootstrap:
 	$(GO) mod download
@@ -37,17 +37,17 @@ sdk-android:
 sdk-android-publish:
 	ANDROID_HOME=$(ANDROID_HOME) $(GRADLE) :sdk-android:publishToMavenLocal
 
-uatu: $(UATU_BIN)
+sanderling: $(SANDERLING_BIN)
 
-$(UATU_BIN): $(SIDECAR_EMBED) web-build
+$(SANDERLING_BIN): $(SIDECAR_EMBED) web-build
 	mkdir -p bin
-	$(GO) build -tags withsidecar -o $(UATU_BIN) ./cmd/uatu
+	$(GO) build -tags withsidecar -o $(SANDERLING_BIN) ./cmd/sanderling
 
-# Installs `uatu` into $GOBIN (or $GOPATH/bin) so it's directly on PATH for
+# Installs `sanderling` into $GOBIN (or $GOPATH/bin) so it's directly on PATH for
 # anyone with a standard Go toolchain setup.
 install: $(SIDECAR_EMBED) web-build
-	$(GO) install -tags withsidecar ./cmd/uatu
-	@dest="$$($(GO) env GOBIN)"; [ -n "$$dest" ] || dest="$$($(GO) env GOPATH)/bin"; echo "installed uatu to $$dest"
+	$(GO) install -tags withsidecar ./cmd/sanderling
+	@dest="$$($(GO) env GOBIN)"; [ -n "$$dest" ] || dest="$$($(GO) env GOPATH)/bin"; echo "installed sanderling to $$dest"
 
 web-build:
 	cd web && bun install --frozen-lockfile && bun run build
@@ -59,7 +59,7 @@ web-dev:
 	cd web && bun run dev
 
 inspect-dev: $(SIDECAR_EMBED)
-	$(GO) run -tags withsidecar ./cmd/uatu inspect --dev
+	$(GO) run -tags withsidecar ./cmd/sanderling inspect --dev
 
 web-typecheck:
 	cd web && bun install --frozen-lockfile && bun run typecheck
@@ -109,7 +109,7 @@ release-cli: $(SIDECAR_JAR)
 
 release-android-local:
 	@if [ -f .env.local ]; then set -a; . ./.env.local; set +a; fi; \
-	  ANDROID_HOME=$(ANDROID_HOME) $(GRADLE) :sdk-android:publishToMavenLocal -Puatu.version=0.0.0-local
+	  ANDROID_HOME=$(ANDROID_HOME) $(GRADLE) :sdk-android:publishToMavenLocal -Psanderling.version=0.0.0-local
 
 release-npm-dry:
 	cd pkg/spec-api && npm ci && npm run build && npm pack --dry-run