feat: implement Phase 1 MVP of Implausibly

Working Android dashboard app for self-hosted Plausible Analytics CE.
Connects to Plausible API v2 (POST /api/v2/query), displays top stats,
visitor chart, top sources, and top pages with date range selection.

Architecture: Kotlin + Jetpack Compose + Material 3 + Hilt + Ktor +
SQLDelight + EncryptedSharedPreferences. Single :app module, four-layer
unidirectional data flow (UI → ViewModel → Repository → Data).

Includes: instance management, site list, caching with TTL per date
range, encrypted API key storage, custom Canvas visitor chart,
pull-to-refresh, and unit tests for API, cache, repository, and
domain model layers.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

gradle.properties

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-3.0-only
+# Project-wide Gradle settings.
+
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+org.gradle.caching=true
+org.gradle.parallel=true
+
+android.useAndroidX=true
+android.nonTransitiveRClass=true