Added release workflow

.github/workflows/release.yml

@@ -0,0 +1,30 @@
+name: goreleaser
+
+on:
+  push:
+    tags:
+      - '*'
+
+permissions:
+  contents: write
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.21.6
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v5
+        with:
+          distribution: goreleaser
+          version: ${{ env.GITHUB_REF_NAME }}
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.PUBLISHER_TOKEN }}

.goreleaser.yaml

@@ -0,0 +1,35 @@
+builds:
+  - binary: cosmium
+    goos:
+      - darwin
+      - linux
+      - windows
+    goarch:
+      - amd64
+      - arm64
+    env:
+      - CGO_ENABLED=0
+    ignore:
+      - goos: linux
+        goarch: arm64
+      - goos: windows
+        goarch: arm64
+
+release:
+  prerelease: auto
+
+universal_binaries:
+  - replace: true
+
+brews:
+  - name: cosmium
+    homepage: 'https://github.com/pikami/cosmium'
+    repository:
+      owner: pikami
+      name: homebrew-pikami
+    commit_author:
+      name: pikami
+      email: git@pikami.org
+
+checksum:
+  name_template: 'checksums.txt'