* docs: add AGENTS.md guidance for AI coding agents

* docs: refine AGENTS.md with import hygiene, draft PR notification, and Java 17 target

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Co-authored-by: Dale Hawkins <[email protected]>

Replaces the unmaintained com.mxalbert.gradle:jacoco-android plugin
(last released for AGP 8.x) and the hand-rolled JaCoCo report wiring
with kotlinx-kover 0.9.9, which supports AGP 9's built-in Kotlin
compiler natively.

- PublishingConventionPlugin now applies Kover instead of JaCoCo,
  dropping the classDirectories workaround that pointed at internal
  AGP intermediate paths.
- data: removed the stale direct jacoco plugin and jacocoDebugReport
  task that still referenced the pre-AGP-9 tmp/kotlin-classes path.
- CI now runs koverXmlReportDebug; report.yml points
  madrapps/jacoco-report (which supports Kover XML) at the new
  reportDebug.xml paths.

…1716)

- Consolidate Kotlin Extensions (KTX into Utils): Move all reactive Coroutine/Flow extensions (awaitMap, mapClickEvents, cameraMoveEvents) and option builder DSLs (addMarker, addPolyline, addPolygon) from android-maps-ktx directly into android-maps-utils.

- Canonical Non-KTX Packages: Place all reactive Coroutine/Flow extensions and DSL builders in canonical com.google.maps.android.* packages.

- Deprecated Compatibility Layer: Preserve the legacy com.google.maps.android.ktx.* package structure with @deprecated(level = DeprecationLevel.WARNING, replaceWith = ReplaceWith(...)) forwarding wrappers and typealiases so existing imports compile seamlessly with deprecation warnings.

- Multi-Module Integration: Integrate KTX extensions across :library, :clustering, :heatmaps, and :data modules.

- Demo & Test Consolidation: Include KtxExtensionsDemoActivity in :demo and integrate all 18 KTX unit test suites with both canonical and shim test coverage.

…aps-ktx

- Add canonical Context.awaitMapsSdkInitialized(preferredRenderer) suspending extension in com.google.maps.android.
- Add deprecated backward-compatibility shim in com.google.maps.android.ktx.
- Add canonical and shim unit test suites for MapsInitializer coroutine extensions.
- Showcase awaitMapsSdkInitialized in KtxExtensionsDemoActivity and register demo in MainActivity.
- Update README.md documentation with awaitMapsSdkInitialized usage example.

…d Gradle wrapper

…me for unit tests

…tructure