WIP: docs: refresh after iOS + web support (#50)

* docs: README covers iOS + web, surface both example apps

* docs(cli): document --ios-device and per-platform doctor

* docs: tighten README, fold examples into Docs list

* docs(runs): correct --clear-data lifecycle wording

Default behavior no longer wipes app data between runs; --clear-data is now opt-in.

* docs(getting-started): add iOS path, separate folio and folio-web

Document just test-ios under examples/folio, and distinguish the KMP
sample from the React + Vite folio-web sample.

* docs(inspect): document the eight panels

Lists Screenshot, ActionList, Timeline, ViolationsPanel, HierarchyPanel,
SnapshotTable, MetricsChart, ExceptionsPanel. Cross-links HierarchyPanel
to the spec language reference.

* docs(writing-specs): document setup export, flag noLogcatErrors as android-only

Mirrors pkg/spec/README.md so the manual covers the runner's setup-first
fall-through. Marks noLogcatErrors as Android-only so iOS/web spec
authors know it silently no-ops.

* docs(folio): document web target and iOS sanderling test recipe

After the KMP refactor folio also runs on wasmJs and the justfile exposes
just web, just web-build, and just test-ios. Surface all three.

* docs(folio-web): add README

Covers prerequisites, demo credentials, just test recipe, and how the
React + Vite host exposes state to the sanderling spec via stable ids
and data-* attributes.

* docs: scrub driver-implementation name from user docs

Drop the implementation tool name from README, cli.md doctor table, and
spec-language.md. These docs should describe behaviour, not the specific
underlying tool the native sidecar wraps.

* docs(development): scrub driver-implementation name from dev docs

architecture, design-principles, decisions now describe the native
sidecar by role (gRPC surface over OS UI-test pipeline) rather than by
the specific tool it wraps.

docs/manual/spec-language.md

@@ -125,7 +125,7 @@ Fields available on every element returned by `find` / `findAll`:
 ### iOS
 
 - `id` maps to the `accessibilityIdentifier` set via `.accessibilityIdentifier` in SwiftUI/UIKit.
-- `desc` maps to `accessibilityText`, which Maestro builds by merging `accessibilityLabel` and the element's value (e.g., `"Close, icon description"`). The `desc:<value>` selector handles this by also matching when the description starts with `<value>, `.
+- `desc` maps to `accessibilityText`, which the iOS sidecar builds by merging `accessibilityLabel` and the element's value (e.g., `"Close, icon description"`). The `desc:<value>` selector handles this by also matching when the description starts with `<value>, `.
 - `class` is the XCUITest element type (e.g., `XCUIElementTypeButton`).
 - `attrs` contains raw XCUITest attributes: `title`, `placeholderValue`, `hasFocus`, etc.