chore(ci): refactor to new fancy build process (#31)

* add bluefin build files for starting
* convert Containerfile/scripts to build modeled after bluefin
* change workflows for new build style
* reformat justfiles
* use owner/upstream specific registries
* use ubuntu:24.04 for cache to work in podman
* tweak the README
* only build stable images for initial merge to verify images without pushing `:40` tagged images

.github/workflows/build-silverblue-latest.yml-disabled

@@ -0,0 +1,29 @@
+name: Silverblue Latest
+on:
+  merge_group:
+  pull_request:
+    branches:
+      - main
+      - testing
+    paths-ignore:
+      - '**.md'
+      - 'system_files/kinoite/**'
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+      - 'system_files/kinoite/**'
+  schedule:
+    - cron: '40 4 * * *'  # 4:40 UTC everyday
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: build
+    uses: ./.github/workflows/reusable-build.yml
+    secrets: inherit
+    with:
+      base_name: silverblue
+      image_version: latest
+

.github/workflows/build-silverblue-stable.yml

@@ -0,0 +1,29 @@
+name: Silverblue Stable
+on:
+  merge_group:
+  pull_request:
+    branches:
+      - main
+      - testing
+    paths-ignore:
+      - '**.md'
+      - 'system_files/kinoite/**'
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+      - 'system_files/kinoite/**'
+  schedule:
+    - cron: '15 5 * * 2'  # 5:15 UTC everyday
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: build
+    uses: ./.github/workflows/reusable-build.yml
+    secrets: inherit
+    with:
+      base_name: silverblue
+      image_version: stable
+