feat(tree-feller): migrate distribution and local harness to Purpur

BREAKING CHANGE: New releases require Java 25/Purpur 26.2 and use purpur-tree-feller-<version>.jar. Runtime TreeFeller identity, data folder, progression and felling/undo behavior are unchanged. Replace the old JAR rather than installing both distributions. The local harness now selects Purpur 2618; its stored worlds and operator/port/RCON settings are preserved. No containers are started by this migration.

.gitea/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: 17
+          java-version: 25
           cache: gradle
 
       - name: Validate conventional commits
@@ -35,6 +35,6 @@ jobs:
       - name: Upload development artifact
         uses: actions/upload-artifact@v3
         with:
-          name: tree-feller-${{ github.sha }}
+          name: purpur-tree-feller-${{ github.sha }}
           path: build/libs/*.jar
           if-no-files-found: error

.gitea/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: 17
+          java-version: 25
           cache: gradle
 
       - name: Set up Node.js
@@ -86,8 +86,8 @@ jobs:
         if: steps.release.outputs.created == 'true'
         uses: actions/upload-artifact@v3
         with:
-          name: tree-feller-${{ steps.release.outputs.version }}
-          path: build/libs/tree-feller-${{ steps.release.outputs.version }}.jar
+          name: purpur-tree-feller-${{ steps.release.outputs.version }}
+          path: build/libs/purpur-tree-feller-${{ steps.release.outputs.version }}.jar
           if-no-files-found: error
 
       - name: Create Gitea release and upload plugin
@@ -101,7 +101,7 @@ jobs:
           PREVIOUS_TAG: ${{ steps.previous_tag.outputs.value }}
         run: |
           api_url="${GITEA_SERVER_URL}/api/v1"
-          jar="build/libs/tree-feller-${VERSION}.jar"
+          jar="build/libs/purpur-tree-feller-${VERSION}.jar"
           export RELEASE_BODY
           if [ -n "$PREVIOUS_TAG" ]; then
             RELEASE_BODY=$(git log --pretty='format:- %s (%h)' "${PREVIOUS_TAG}..HEAD")
@@ -138,4 +138,4 @@ jobs:
             -H "Authorization: token ${GITEA_TOKEN}" \
             -H "Content-Type: application/octet-stream" \
             --data-binary "@${jar}" \
-            "${api_url}/repos/${REPOSITORY}/releases/${release_id}/assets?name=tree-feller-${VERSION}.jar"
+            "${api_url}/repos/${REPOSITORY}/releases/${release_id}/assets?name=purpur-tree-feller-${VERSION}.jar"