feat: Add GitHub Actions for PNG generation and GoReleaser

Adds two GitHub Actions workflows:

- A workflow to automatically regenerate the `vim-barcodes-a4.png` file when any Go file is modified on the main branch. This ensures the PNG is always up-to-date with the code.

- A GoReleaser workflow that triggers on new version tags (e.g., v1.2.3) to create a new release with binaries for multiple platforms, including .deb and .rpm packages.

Also adds a `.goreleaser.yml` configuration file to customize the release process. The Go version for the workflows is dynamically determined from the `go.mod` file.

Author: google-labs-jules[bot]

.github/workflows/generate-png.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version-file: 'go.mod'
 
       - name: Install dependencies
         run: go get .

.github/workflows/goreleaser.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version-file: 'go.mod'
 
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v4

.goreleaser.yml

@@ -26,3 +26,15 @@ changelog:
     exclude:
       - '^docs:'
       - '^test:'
+nfpms:
+  -
+    id: "vim-barcode-sheet"
+    package_name: "vim-barcode-sheet"
+    homepage: "https://github.com/arran4/vim-barcode-sheet"
+    maintainer: "Arran Ubels <[email protected]>"
+    description: "Vim barcode sheet generator."
+    license: "MIT"
+    formats:
+      - "deb"
+      - "rpm"
+    bindir: "/usr/bin"