feat: Phase 2 (fragment migration), Phase 3 (testing infrastructure), Phase 4 (CI/CD)

Phase 2: Fragment Migration
- Migrated 42 ingredients to 54 fine-grained fragments
- Replaced %include with %ksappend syntax
- Created organized fragment structure (platform/generic-43, platform/generic-rawhide, shared/)
- Updated generator to use fragment paths
- All 16 manifest variants generate successfully

Phase 3: Testing Infrastructure
- Created containerized test runner (tests/container/)
- Added integration test suite (tests/integration/)
- Created golden master fixtures (tests/fixtures/expected_recipes/)
- 41 tests passing (36 unit + 5 integration)
- 54 fragments, 16 recipes validated

Phase 4: CI/CD Integration
- 5 new workflows: validate-recipes, validate-fragments, test-generation, container-tests, build-iso
- Added validation gates before ISO builds
- Works with existing fedora-runner-image
- Local testing support via act_runner

fragments/shared/live/core/base.ks

@@ -0,0 +1,3 @@
+# Live core base configuration
+
+poweroff # Shut down the system after a successful installation

fragments/shared/live/core/bootloader/grub.ks

@@ -0,0 +1,3 @@
+# Live core bootloader configuration
+
+bootloader --timeout=1 # Set the GNU GRUB bootloader timeout to 1 and to location to none

fragments/shared/live/core/bootloader/systemd-boot.ks

@@ -0,0 +1,3 @@
+# Live core systemd-boot configuration
+
+bootloader --sdboot --location=none --timeout=1 # Use systemd-boot and set location to none

fragments/shared/live/core/packages.ks

@@ -0,0 +1,25 @@
+# Anaconda tools and kernel packages for live media
+
+%packages # Beginning of the package section. Include weak dependencies. Description courtesy of the Fedora project
+
+@anaconda-tools
+
+# Explicitly specified here:
+# <notting> walters: because otherwise dependency loops cause yum issues.
+kernel
+kernel-modules
+kernel-modules-extra
+
+# Need aajohan-comfortaa-fonts for the SVG rnotes images
+aajohan-comfortaa-fonts
+
+# Without this, initramfs generation during live image creation fails: #1242586
+dracut-live
+
+# anaconda needs the locales available to run for different locales
+glibc-all-langpacks
+
+# provide the livesys scripts
+livesys-scripts
+
+%end

fragments/shared/live/core/storage.ks

@@ -0,0 +1,7 @@
+# Live core storage configuration
+
+zerombr # WARNING : Dangerous command ! Will clear the Master Boot Record
+clearpart --all --initlabel # Partition clearing information. This setup uses GPT by default.
+
+part / --fstype="ext4" --size=5120 # Create a root partition of around 7GB
+part / --size=8576