Add various improvements (#19)

* Add white stroke to icon

* Add lint workflow

* Add build workflow

* Add support for firefox android

.github/workflows/build.yaml

@@ -0,0 +1,39 @@
+name: "Build"
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  build:
+    name: "Build"
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v4
+
+      - name: Install jq
+        run: sudo apt-get install jq
+
+      - name: Get extension version
+        id: vars
+        run: |
+          version=$(jq -r .version manifest.json)
+          echo "version=$version" >> $GITHUB_OUTPUT
+          echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+
+      - name: "web-ext build"
+        id: web-ext-build
+        uses: kewisch/action-web-ext@v1
+        with:
+          cmd: build
+          source: .
+          filename: "rfd-redirect-stripper-${{steps.vars.outputs.version}}-${{steps.vars.outputs.sha_short}}.xpi"
+          ignoreFiles: '[ "package.json","package-lock.json","yarn.lock" ]'
+
+      - name: "Upload Artifact"
+        uses: actions/upload-artifact@v4
+        with:
+          name: "rfd-redirect-stripper-${{steps.vars.outputs.version}}-${{steps.vars.outputs.sha_short}}.xpi"
+          path: ${{ steps.web-ext-build.outputs.target }}