ci: .github: Add manifest and CI build configuration for styhead release

- Introduced a new `manifest-styhead.xml` file in the `.github/manifest`
  directory.
- Added "styhead" CI build steps to the GitHub Actions workflow.

.github/manifest/manifest-styhead.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<manifest>
+  <default sync-j="2"/>
+
+  <remote fetch="https://git.openembedded.org/" name="oe"/>
+  <remote fetch="https://git.yoctoproject.org/git/" name="yocto"/>
+  <remote fetch="https://github.com" name="github"/>
+  <remote fetch="https://github.com/Igalia" name="igalia"/>
+  <remote fetch="https://gitlab.com" name="gitlab"/>
+  <remote fetch="http://code.qt.io/yocto" name="qt"/>
+
+  <project remote="oe" revision="styhead" name="meta-openembedded" path="sources/meta-openembedded"/>
+
+  <project remote="yocto" revision="styhead" name="poky" path="sources/poky"/>
+  <project remote="yocto" revision="master" name="meta-raspberrypi" path="sources/meta-raspberrypi"/>
+
+  <project remote="igalia" revision="main" name="meta-webkit.git" path="sources/meta-webkit"/>
+</manifest>

.github/workflows/test-build.yml

@@ -84,3 +84,22 @@ jobs:
           repo_release: 'scarthgap'
     needs: scarthgap-repo
 
+  styhead-repo:
+    runs-on: self-hosted
+    if: "!contains(github.event.head_commit.message, 'ci skip')"
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/bitbake-repo
+        with:
+          repo_release: 'styhead'
+
+  styhead-raspberrypi3-mesa-weston-wpe-2-46:
+    runs-on: self-hosted
+    if: "!contains(github.event.head_commit.message, 'ci skip')"
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/bitbake-build
+        with:
+          bitbake_source: 'raspberrypi3-mesa-wpe-2-46 raspberrypi3-mesa poky layers.raspberrypi.webkit conf_v4.wpe-2_46'
+          repo_release: 'styhead'
+    needs: styhead-repo