refactor: code organization cleanup (#35)

* chore: fix gitignore + decisions doc after web->inspect-ui rename

Update web/ references to inspect-ui/ in .gitignore and Makefile. Add
decisions.md tracking architectural decisions from code-org discussion.

* refactor: rename pkg/spec-api to pkg/spec

Aligns the directory name with the npm package name @sanderling/spec.
Updates Makefile, package.json directory field, and resolveSpecAPIPath.

* refactor(verifier): split bindings.go into types.go + bindings.go

Move shared public types (Action, ActionKind, LogEntry, Exception) to
types.go. bindings.go retains internal JS runtime wiring only.

* refactor(inspect): split runs.go into runs.go, runs_cache.go, runs_decode.go

runs.go: types (RunSummary, StepSummary, RunDetail, Run) and Scan.
runs_cache.go: Cache type, Open/Step/Detail methods, parseRun, scanSteps.
runs_decode.go: readMeta, tallyTrace, decodeStepSummary, validRunID.

* refactor: move android_env.go to internal/android/

Extracts Android device/AVD/adb logic into internal/android package.
Exports EnsureDevice, AdbReverse, AdbReverseRemove, EnvWithAndroidPlatformTools, AdbBinary.
Moves tests to internal/android/android_test.go. cmd/sanderling becomes a thin caller.

* refactor: extract test pipeline to internal/testrun/

runTestPipeline logic moves to testrun.Execute. buildDriver, resolveSpecAPIPath,
pickFreePort, and the progress logger move to internal/testrun/. cmd/sanderling/test_run.go
becomes a thin adapter. Tests follow their code.

* ci: update workflow paths after pkg/spec-api -> pkg/spec rename

pkg/spec/src/defaults/properties.ts

@@ -0,0 +1,21 @@
+import { always } from "../ltl.ts";
+import { extract } from "../extract.ts";
+import type { Formula } from "../types.ts";
+
+const exceptionCount = extract<number>((state) => state.exceptions.length);
+
+// Fails when the SDK captured an uncaught throwable or a Sanderling.reportError
+// call surfaced one during the run.
+export const noUncaughtExceptions: Formula = always(
+  () => exceptionCount.current === 0,
+);
+
+const errorLogCount = extract<number>(
+  (state) => state.logs.reduce((count, log) => count + (log.level === "E" ? 1 : 0), 0),
+);
+
+// Fails when the runner's logcat fetch observed any error-level lines since
+// the previous step.
+export const noLogcatErrors: Formula = always(
+  () => errorLogCount.current === 0,
+);