Move publishing to org.korge and update Kotlin dependencies to 2.3.20

[jobe-m]

• Toolchain was updated: Kotlin 2.3.20, AGP 8.13.1, Dokka 2.1.0, Gradle 8.14.4
• Custom Sonatype staging/release logic was replaced with com.vanniktech.maven.publish for signing + Central Portal publishing
• Namespace on maven central was changed to org.korge and Maven Central badge in README.md was updated
• GitHub Actions workflows were refreshed (Java 21, updated actions versions, new publish and dokka tasks, optional yarn lock upgrade)
• API check was updated
• Update korlibs dependencies: org.korge:korlibs-annotations:6.1.0 org.korge:korlibs-compression:6.1.0 org.korge:korlibs-wasm:6.1.0 org.jetbrains.kotlinx:atomicfu:0.32.1 org.jetbrains.kotlinx:kotlinx-browser-wasm-js:0.5.0 org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2 org.jetbrains.kotlinx:kotlinx-coroutines-test:1.10.2 net.java.dev.jna:jna:5.18.1 net.java.dev.jna:jna-platform:5.18.1

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.56%. Comparing base (5891bdb) to head (adf3ab8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #3   +/-   ##
=======================================
  Coverage   42.56%   42.56%           
=======================================
  Files           5        5           
  Lines         242      242           
  Branches       25       24    -1     
=======================================
  Hits          103      103           
  Misses        126      126           
  Partials       13       13           

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[augmentcode]

🤖 Augment PR Summary

Summary: This PR migrates korlibs-image-core publishing and tooling to the new org.korge namespace while updating the build stack to modern Kotlin/Gradle tooling.

Changes:

• Switched Maven group and Android namespace from com.soywiz to org.korge, and updated the Maven Central badge in README.md.
• Upgraded toolchain versions: Kotlin 2.3.20, AGP 8.13.1, Dokka 2.1.0, Kover 0.9.3, binary-compat validator 0.18.1, and Gradle wrapper 8.14.4.
• Replaced custom Sonatype staging/signing/release logic with com.vanniktech.maven.publish and added compatibility mapping for Central Portal + signing properties.
• Refreshed GitHub Actions workflows (Java 21, Node 24, Deno 2.x, updated pinned action SHAs) and updated publish/docs tasks.
• Updated API dumps and bumped module dependencies to the new org.korge:korlibs-* 6.1.0 line plus newer coroutines/atomicfu/JNA and a WASM browser dependency.

Technical Notes: Android bytecode remains Java 8 via compileOptions, while CI/tooling moves to Java 21 for builds/tests/publishing.

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[augmentcode]

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