Linux: add new icons, brand colors, and CI (#29)

* Linux: add new icons to Flatpak manifest

Follow-up to #28

* MetaInfo: Update brand colors, add release notes

* GitHub Actions: Add Flatpak action

Help make sure any Linux changes don't break the Flatpak build.

Author: cassidyjames

.github/workflows/flatpak.yml

@@ -0,0 +1,24 @@
+name: Flatpak
+on:
+  push:
+    branches:
+    - master4
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  flatpak:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/flathub-infra/flatpak-github-actions:gnome-47
+      options: --privileged
+    steps:
+    - uses: actions/checkout@v4
+    - uses: flathub-infra/flatpak-github-actions/flatpak-builder@master
+      with:
+        bundle: rota.flatpak
+        manifest-path: linux/net.hhoney.rota.yml
+        cache-key: "flatpak-builder-${{ github.sha }}"

linux/net.hhoney.rota.metainfo.xml

@@ -3,7 +3,7 @@
   <name>ROTA</name>
   <summary>Gravity bends beneath your feet</summary>
   <branding>
-    <color type="primary" scheme_preference="light">#ff99ff</color>
+    <color type="primary" scheme_preference="light">#ffc3d6</color>
     <color type="primary" scheme_preference="dark">#850087</color>
   </branding>
   <developer_name translatable="no">HHoney Software</developer_name>
@@ -61,6 +61,11 @@
     </screenshot>
   </screenshots>
   <releases>
+    <release version="2025.02.23" date="2025-02-23">
+      <description>
+        <p>Refreshed app icon and brand colors</p>
+      </description>
+    </release>
     <release version="2024.12.10" date="2024-12-10">
       <description>
         <p>Touch screen revisions</p>

linux/net.hhoney.rota.yml

@@ -26,5 +26,5 @@ modules:
   - install -Dm644 ROTA.pck ${FLATPAK_DEST}/bin/godot-runner.pck
   - install -Dm644 linux/${FLATPAK_ID}.desktop ${FLATPAK_DEST}/share/applications/${FLATPAK_ID}.desktop
   - install -Dm644 linux/${FLATPAK_ID}.metainfo.xml ${FLATPAK_DEST}/share/metainfo/${FLATPAK_ID}.metainfo.xml
-  - install -Dm644 media/image/icon/icon256.png ${FLATPAK_DEST}/share/icons/hicolor/256x256/apps/${FLATPAK_ID}.png
-
+  - install -Dm644 linux/${FLATPAK_ID}.svg ${FLATPAK_DEST}/share/icons/hicolor/scalable/apps/${FLATPAK_ID}.svg
+  - install -Dm644 linux/${FLATPAK_ID}-symbolic.svg ${FLATPAK_DEST}/share/icons/hicolor/symbolic/apps/${FLATPAK_ID}-symbolic.svg