Add GitHub Actions release workflow and build scripts

- Add .github/workflows/release.yml for automated releases on version tags
- Add scripts/build-static.sh for building statically linked binaries
- Add scripts/prepare-release.sh for preparing release artifacts
- Optimize Cargo.toml for smaller binary size (reduced from 4.5MB to 2.9MB)
- Add scripts/README.md with usage documentation

The workflow automatically builds binaries for Linux (musl) and macOS (Intel/ARM)
when a version tag is pushed.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

1 files changed, 56 insertions, 0 deletions

diff --git a/scripts/README.md b/scripts/README.md
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+# Build Scripts
+
+This directory contains scripts for building and releasing the oar-p2p binary.
+
+## Scripts
+
+### build-static.sh
+
+Builds statically linked binaries for Linux and macOS.
+
+```bash
+# Build for all platforms (macOS only)
+./scripts/build-static.sh all
+
+# Build for Linux only
+./scripts/build-static.sh linux
+
+# Build for macOS only (macOS only)
+./scripts/build-static.sh macos
+
+# Specify custom output directory
+./scripts/build-static.sh linux /path/to/output
+```
+
+**Note**: Cross-compilation is not supported. Linux binaries must be built on Linux, and macOS binaries must be built on macOS. The GitHub Actions workflow handles this by using different runners.
+
+### prepare-release.sh
+
+Prepares a release by building binaries, creating tarballs, and generating checksums.
+
+```bash
+# Prepare release for version v1.0.0
+./scripts/prepare-release.sh v1.0.0
+
+# Specify custom output directory
+./scripts/prepare-release.sh v1.0.0 /path/to/dist
+```
+
+The script will:
+1. Build static binaries for the current platform
+2. Create tarballs with the binary and README
+3. Generate SHA256 and SHA512 checksums
+4. Create a release notes template
+
+## GitHub Actions
+
+The `.github/workflows/release.yml` workflow automatically:
+1. Triggers on version tags (e.g., `v1.0.0`)
+2. Builds binaries on Linux and macOS runners
+3. Creates a GitHub release with all artifacts
+
+To create a release:
+```bash
+git tag -a v1.0.0 -m "Release v1.0.0"
+git push origin v1.0.0
+```
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