Update dependencies and migrate to Gradle 9 / Dokka v2

Dependency bumps: Kotlin 2.3.20->2.3.21, Coroutines 1.10.2->1.11.0,
Ktor 3.4.2->3.5.1, KSP 2.3.6->2.3.9, MicroUtils 0.29.2->0.30.0,
Dokka 2.0.0->2.2.0, Versions plugin 0.53.0->0.54.0, NMCP 1.4.4->1.6.0.

Gradle wrapper 8.13->9.6.1 with build-script fixes for Gradle 9:
Project.exec() -> providers.exec(), tasks.whenTaskAdded -> tasks.configureEach.

Dokka migrated to the Dokka Gradle Plugin v2. The docs module is now
included as the KDocs aggregator (dokka {} DSL with sourceRoots, new URI,
ProcessIsolation heap for the generator worker), excluded from binary
compatibility validation, and the kdocs workflow runs :docs:dokkaGenerate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,19 @@
 
 ## 35.1.0
 
+* `Dependencies`:
+    * `Kotlin`: `2.3.20` -> `2.3.21`
+    * `Coroutines`: `1.10.2` -> `1.11.0`
+    * `Ktor`: `3.4.2` -> `3.5.1`
+    * `KSP`: `2.3.6` -> `2.3.9`
+    * `MicroUtils`: `0.29.2` -> `0.30.0`
+    * `Dokka`: `2.0.0` -> `2.2.0`
+    * `Versions`: `0.53.0` -> `0.54.0`
+    * `NMCP`: `1.4.4` -> `1.6.0`
+* `Build`:
+    * Updated Gradle wrapper `8.13` -> `9.6.1` and migrated build scripts to be Gradle 9 compatible (`Project.exec` -> `providers.exec`, `tasks.whenTaskAdded` -> `tasks.configureEach`)
+    * Migrated Dokka documentation to the Dokka Gradle Plugin v2: the `docs` module is now included in the build as the KDocs aggregator (`./gradlew :docs:dokkaGenerate`) and the `Publish KDocs` workflow was updated accordingly
+
 ## 35.0.0
 
 **THIS UPDATE CONTAINS SUPPORT OF [TELEGRAM BOTS API 10.1](https://core.telegram.org/bots/api-changelog#june-11-2026)**