added gloop as submodule. added. did some more stubbing for google internal code

.github/workflows/release-minimal-appimage.yaml

@@ -21,7 +21,7 @@ permissions:
 jobs:
   build-and-release-appimage:
     name: Build and Release QuickShare AppImage
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     steps:
       - name: Validate release tag
@@ -48,9 +48,16 @@ jobs:
       - name: Install Linux build dependencies
         run: |
           sudo apt-get update
+          sudo apt-get install -y ca-certificates gnupg wget
+          wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key \
+            | gpg --dearmor \
+            | sudo tee /usr/share/keyrings/apt.llvm.org.gpg >/dev/null
+          echo "deb [signed-by=/usr/share/keyrings/apt.llvm.org.gpg] https://apt.llvm.org/noble/ llvm-toolchain-noble-21 main" \
+            | sudo tee /etc/apt/sources.list.d/llvm-21.list
+          sudo apt-get update
           sudo apt-get install -y \
             build-essential \
-            clang \
+            clang-21 \
             cmake \
             ninja-build \
             pkg-config \

.github/workflows/validate.yaml

@@ -22,7 +22,7 @@ env:
 jobs:
   build-linux:
     name: Build Linux
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -42,9 +42,16 @@ jobs:
       - name: Install build dependencies
         run: |
           sudo apt-get update
+          sudo apt-get install -y ca-certificates gnupg wget
+          wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key \
+            | gpg --dearmor \
+            | sudo tee /usr/share/keyrings/apt.llvm.org.gpg >/dev/null
+          echo "deb [signed-by=/usr/share/keyrings/apt.llvm.org.gpg] https://apt.llvm.org/noble/ llvm-toolchain-noble-21 main" \
+            | sudo tee /etc/apt/sources.list.d/llvm-21.list
+          sudo apt-get update
           sudo apt-get install -y \
             build-essential \
-            clang \
+            clang-21 \
             cmake \
             ninja-build \
             pkg-config \