feat: prepare for publish to maven central

 - remove authentication use system env username and password to auth

.github/workflows/releaase-to-central-sonatype.yml

@@ -0,0 +1,26 @@
+name: build and publish a release to Central Sonatype
+
+#on:
+#  release:
+#    types: [published]
+
+jobs:
+  build:
+    runs-on: macOS-latest
+    env:
+      SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+      SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+      SIGNING_KEY: ${{ secrets.SIGNING_KEY }}
+      SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v3
+      - name: Release to Central Sonatype with Gradle
+        run: ./gradlew build publishAggregationPublicationsToSonatypePortalRepository

build.gradle.kts

@@ -1,5 +1,4 @@
 plugins {
-//    id("root.publication")
     `maven-publish`
     //trick: for the same plugin versions in all sub-modules
     alias(libs.plugins.androidLibrary).apply(false)

gradle.properties

@@ -15,15 +15,6 @@ android.nonTransitiveRClass=true
 LIBRARY_VERSION=0.1
 GROUP=com.tddworks
 
-signing.keyId=[keyId]
-signing.password=[password]
-signing.secretKeyRingFile=[secretKeyRingFile]
-
-# OSS TODO
-SONATYPE_HOST=DEFAULT
-RELEASE_SIGNING_ENABLED=true
-SONATYPE_AUTOMATIC_RELEASE=true
-
 # POM
 POM_NAME=OpenAI Kotlin
 POM_DESCRIPTION=OpenAI API KMP Client