Add release script and workflow for sound converter

.github/workflows/publish-sound-converter.yml

@@ -0,0 +1,20 @@
+name: Publish agb-sound-converter
+
+on:
+  push:
+    tags:
+      - agb-sound-converter/v*
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Install build tools
+        run: sudo apt-get update && sudo apt-get install build-essential binutils-arm-none-eabi -y
+      - name: Check out repository
+        uses: actions/checkout@v2
+      - name: Login to crates.io
+        run: cargo login ${{ secrets.CRATE_API }}
+      - name: Publish agb-sound-converter
+        run: cargo publish
+        working-directory: ./agb-sound-converter

release.sh

@@ -35,6 +35,10 @@ case "$PROJECT" in
         DIRECTORY="agb-image-converter"
         TAGNAME="agb-image-converter/v$VERSION"
         ;;
+    agb-sound-converter)
+        DIRECTORY="agb-sound-converter"
+        TAGNAME="agb-sound-converter/v$VERSION"
+        ;;
     agb-macros)
         DIRECTORY="agb-macros"
         TAGNAME="agb-macros/v$VERSION"