Add support for release and download

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*' # This workflow runs on tags like v1.0, v1.2.3
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          # This is needed for GoReleaser to determine the changelog.
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          # The Go version from your go.mod file.
+          go-version: '1.24'
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v5
+        with:
+          # We use the GoReleaser distribution itself.
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+        env:
+          # This token is provided by GitHub Actions to allow creating releases.
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

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+# yaml-language-server: $schema=https://goreleaser.com/static/schema.json
+# This is the configuration for GoReleaser
+project_name: gitx
+
+builds:
+  - # Each build is an object with its own configuration.
+    id: gitx
+    # The main package for your application.
+    main: ./cmd/gitx/
+    # The name of the binary file.
+    binary: gitx
+    env:
+      # CGO_ENABLED=0 is used to build a statically linked binary.
+      - CGO_ENABLED=0
+    # Platforms to build for.
+    goos:
+      - linux
+      - darwin # macOS
+    goarch:
+      - amd64 # For Intel/AMD processors
+      - arm64 # For Apple Silicon and other ARM processors
+
+# Configuration for the archives (e.g., .tar.gz files).
+archives:
+  - format: tar.gz
+    # This template creates archives like "gitx_1.0.0_linux_amd64.tar.gz"
+    name_template: >-
+      {{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}
+    # Files to include in the archive along with the binary.
+    files:
+      - LICENSE
+      - README.md

install.sh

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+#!/bin/sh
+#
+# This script downloads and installs the latest binary release of gitx.
+# It detects the user's OS and architecture to download the correct binary.
+#
+# Usage:
+# curl -sSL https://raw.githubusercontent.com/gitxtui/gitx/master/install.sh | bash
+
+set -e
+
+# The GitHub repository in the format "owner/repo".
+REPO="gitxtui/gitx"
+INSTALL_DIR="/usr/local/bin"
+
+# Get the operating system.
+get_os() {
+  case "$(uname -s)" in
+    Linux*)   OS='linux';;
+    Darwin*)  OS='darwin';;
+    *)
+      echo "Unsupported operating system: $(uname -s)"
+      exit 1
+      ;;
+  esac
+  echo "$OS"
+}
+
+# Get the architecture.
+get_arch() {
+  case "$(uname -m)" in
+    x86_64|amd64) ARCH='amd64';;
+    aarch64|arm64) ARCH='arm64';;
+    *)
+      echo "Unsupported architecture: $(uname -m)"
+      exit 1
+      ;;
+  esac
+  echo "$ARCH"
+}
+
+# Get the latest release tag from the GitHub API.
+get_latest_release() {
+  curl --silent "https://api.github.com/repos/$REPO/releases/latest" |
+  grep '"tag_name":' |
+  sed -E 's/.*"([^"]+)".*/\1/'
+}
+
+main() {
+  OS=$(get_os)
+  ARCH=$(get_arch)
+  VERSION=$(get_latest_release)
+
+  if [ -z "$VERSION" ]; then
+    echo "Error: Could not find the latest release version for $REPO."
+    exit 1
+  fi
+
+  # Construct the archive filename and download URL.
+  VERSION_NUM=$(echo "$VERSION" | sed 's/v//')
+  FILENAME="gitx_${VERSION_NUM}_${OS}_${ARCH}.tar.gz"
+  DOWNLOAD_URL="https://github.com/$REPO/releases/download/${VERSION}/${FILENAME}"
+
+  # Download and extract the binary.
+  echo "Downloading gitx ${VERSION} for ${OS}/${ARCH}..."
+  TEMP_DIR=$(mktemp -d)
+  # Download to a temporary directory.
+  curl -sSL -o "$TEMP_DIR/$FILENAME" "$DOWNLOAD_URL"
+
+  echo "Installing gitx to ${INSTALL_DIR}..."
+  # Extract the archive.
+  tar -xzf "$TEMP_DIR/$FILENAME" -C "$TEMP_DIR"
+
+  # Move the binary to the installation directory.
+  # Use sudo if the directory is not writable by the current user.
+  if [ -w "$INSTALL_DIR" ]; then
+    mv "$TEMP_DIR/gitx" "${INSTALL_DIR}/gitx"
+  else
+    echo "Root permission is required to install gitx to ${INSTALL_DIR}"
+    sudo mv "$TEMP_DIR/gitx" "${INSTALL_DIR}/gitx"
+  fi
+
+  # Clean up the temporary directory.
+  rm -rf "$TEMP_DIR"
+
+  echo ""
+  echo "gitx has been installed successfully!"
+  echo "Run 'gitx' to get started."
+}
+
+# Run the main function.
+main