Add pre-compiled binaries for common platforms and architectures to release process

[DariuszPorowski]

Problem Statement

Current releases do not provide pre-compiled binaries. Requiring users to install Go and manually build the project complicates setup and distribution. Providing standalone binaries for common OS/platforms will simplify installation and usage for end-users.

Requested Feature

As part of the release process, publish pre-compiled binaries for common platforms/architectures:

• terrafmt_linux_386.tar.gz
• terrafmt_linux_amd64.tar.gz
• terrafmt_linux_arm64.tar.gz
• terrafmt_darwin_arm64.tar.gz
• terrafmt_darwin_x64.tar.gz
• terrafmt_windows_386.zip
• terrafmt_windows_amd64.zip
• terrafmt_windows_arm64.zip

Implementation Suggestions

• Use GoReleaser to automate multi-platform build and release workflow.
• Ensure correct version info is injected via -ldflags (see Go build flags documentation and Go documentation on ldflags).
• Dynamically set version in lib/version/version.go via ldflags.

Acceptance Criteria

• Pre-compiled binaries provided as release assets for all listed platforms/architectures
• Version embedded in binary via ldflags
• GitHub Actions automates build/release with GoReleaser

Example improvement

• Users downloading releases will no longer need Go installed; installation via pre-built binary will be quick and reliable.

[DariuszPorowski]

related to #87