Build Site and fix 1288 (#1289)

Besides a fix for #1288 the change also contains 

* a respective CI build (`mvn ... site`) to detect such problems early in the future
* a simplification for GH CI triggers (build on each push, not only master and PRs)

The latter leads to CI builds for each development change (which is a major purpose of an automatic build and helps in particular for forks/new contributors who cannot issue a automatic build by creating a PR). Having said that, the respective commit could be dropped if there is a good reason not to follow this practice.

Fixes #1288

.github/workflows/early-access.yaml

@@ -20,9 +20,6 @@ name: Early Access
 # trigger on push to branches and PR
 on:
   push:
-    branches:
-      - master
-      - mvnd-1.x
   pull_request:
 
 env:
@@ -187,3 +184,29 @@ jobs:
         with:
           name: mvnd-${{ env.OS }}-${{ env.ARCH }}
           path: dist/target/maven-mvnd-*.zip
+
+  site-build:
+    name: 'Site build'
+    if: startsWith(github.event.head_commit.message, '[release] Release ') != true
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
+        with:
+          java-version: ${{ env.JAVA_VERSION }}
+          distribution: 'temurin'
+
+      - name: 'Set up Maven'
+        shell: bash
+        run: mvn --errors --batch-mode --show-version org.apache.maven.plugins:maven-wrapper-plugin:3.3.2:wrapper "-Dmaven=4.0.0-rc-3"
+
+      - name: 'Run site build'
+        run: ./mvnw compile site -Dmrm=false -V -B -ntp -e -s .mvn/release-settings.xml
+
+      - name: 'Upload artifact'
+        uses: actions/upload-artifact@v4
+        with:
+          name: mvnd-site
+          path: target/site

pom.xml

@@ -95,6 +95,8 @@
     <version.plexus-xml>4.0.4</version.plexus-xml>
     <jakarta.inject.version>2.0.1</jakarta.inject.version>
 
+    <version.maven-fluido-skin>2.1.0</version.maven-fluido-skin>
+
     <!-- plugin versions a..z -->
     <buildnumber-maven-plugin.version>3.2.1</buildnumber-maven-plugin.version>
     <groovy-maven-plugin.version>4.1.1</groovy-maven-plugin.version>