chore: rename cameleer3 to cameleer

Rename Java packages from com.cameleer3 to com.cameleer, module
directories from cameleer3-* to cameleer-*, and all references
throughout workflows, Dockerfiles, docs, migrations, and pom.xml.

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

.gitea/workflows/sonarqube.yml

@@ -59,5 +59,5 @@ jobs:
           mvn clean verify sonar:sonar -DskipITs -U --batch-mode \
             -Dsonar.host.url=${{ secrets.SONAR_HOST_URL }} \
             -Dsonar.token=${{ secrets.SONAR_TOKEN }} \
-            -Dsonar.projectKey=cameleer3-server \
-            -Dsonar.projectName="Cameleer3 Server"
+            -Dsonar.projectKey=cameleer-server \
+            -Dsonar.projectName="Cameleer Server"