Implement optional Skia codec adapter (#41)

.gitea/workflows/skia.yml

@@ -0,0 +1,50 @@
+name: Skia feature
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+    env:
+      FORCE_SKIA_BINARIES_DOWNLOAD: "1"
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Install native link prerequisites
+        run: |
+          sudo apt-get update
+          sudo apt-get install --yes curl pkg-config libfontconfig1-dev libfreetype6-dev
+      - name: Test default and Skia feature builds
+        run: |
+          cargo test -p libremetaverse-imaging-skia --no-default-features
+          cargo test -p libremetaverse-imaging-skia --features skia
+          cargo package -p libremetaverse-imaging-skia --list
+
+  macos:
+    runs-on: macos-latest
+    env:
+      FORCE_SKIA_BINARIES_DOWNLOAD: "1"
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Test default and Skia feature builds
+        run: |
+          cargo test -p libremetaverse-imaging-skia --no-default-features
+          cargo test -p libremetaverse-imaging-skia --features skia
+          cargo package -p libremetaverse-imaging-skia --list
+
+  windows:
+    runs-on: windows-latest
+    env:
+      FORCE_SKIA_BINARIES_DOWNLOAD: "1"
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Test default and Skia feature builds
+        shell: pwsh
+        run: |
+          cargo test -p libremetaverse-imaging-skia --no-default-features
+          cargo test -p libremetaverse-imaging-skia --features skia
+          cargo package -p libremetaverse-imaging-skia --list