Add release configuration

- Add .goreleaser.yaml for automated cross-platform builds
- Add GitHub Actions workflow for releases
- Add agent instructions for creating releases
- Configure Homebrew tap support

Author: andreagrandi

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25'
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-1.25-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-1.25-
+
+      - name: Run tests
+        run: make test
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          distribution: goreleaser
+          version: '~> v2'
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_REPOSITORY_OWNER: ${{ github.repository_owner }}
+          GITHUB_REPOSITORY_NAME: ${{ github.event.repository.name }}
+          GORELEASER_GITHUB_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}

.goreleaser.yaml

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+version: 2
+
+project_name: sentire
+
+before:
+  hooks:
+    - go mod tidy
+    - go generate ./...
+
+builds:
+  - main: ./cmd/sentire/main.go
+    binary: sentire
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - darwin
+      - windows
+    goarch:
+      - amd64
+      - arm64
+    ignore:
+      - goos: windows
+        goarch: arm64
+    ldflags:
+      - -s -w -X sentire/internal/version.Version={{.Version}}
+
+archives:
+  - name_template: >-
+      {{ .ProjectName }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end }}
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - README.md
+      - LICENSE
+
+checksum:
+  name_template: 'checksums.txt'
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+      - '^ci:'
+      - Merge pull request
+      - Merge branch
+      - go mod tidy
+
+release:
+  name_template: "Release v{{ .Version }}"
+  draft: false
+  prerelease: auto
+
+brews:
+  - name: sentire
+    repository:
+      owner: andreagrandi
+      name: homebrew-tap
+      token: "{{ .Env.GORELEASER_GITHUB_TOKEN }}"
+    commit_author:
+      name: goreleaserbot
+      email: [email protected]
+    directory: Formula
+    homepage: "https://github.com/andreagrandi/sentire"
+    description: "Sentire - A CLI tool for the Sentry API"
+    license: "MIT"
+    test: |
+      system "#{bin}/sentire --version"
+    install: |
+      bin.install "sentire"

.opencode/agent/new-release.md

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+---
+description: Create a new release for this application, bumping the version and updating the changelog
+mode: subagent
+---
+
+When asked to create a new release, you need to:
+- Make sure `make test` passes without errors
+- Use the provided version number or
+  Bump the version number in internal/version/version.go:
+  if you find `const Version = "0.1.0"` change to `const Version = "0.1.1"`
+- Update the changelog writing a short summary of the changes since last release (with bullet points), follow existing format
+- git commit the changes you just did
+- git push the changes you just did
+- do `git tag v<version>` (use the version you just bumped to in the `internal/version/version.go`)
+- do `git push origin v<version>`