Adds comprehensive build versioning support to inject version information into all binaries at build time using ldflags

[Vikramarjuna]

Add Build Versioning Infrastructure

Add Version Information Support

Summary

Adds -version flag to all binaries using Go's embed package and VCS build info.

Changes

New Files:

• lib/version/VERSION - Base version string
• lib/version/version.go - Version package using embed + debug.ReadBuildInfo()

Modified Files:

• lib/flags/loadflags/api.go - Register version flag
• lib/flags/loadflags/impl.go - Version flag implementation

Version Format

• v0.12.0+abc12345 - normal build
• v0.12.0+abc12345-dirty - uncommitted changes

Usage

$ domtool -version
domtool v0.12.0+28a3a2c6
  Commit: 28a3a2c6
  Built:  2026-02-18T14:52:17Z
  Go:     go1.25.4

Note

• Requires a release workflow to update lib/version/VERSION when creating new releases

[rgooch]

I would like this PR to be split, with the first PR containing only the minimum to add version information (i.e. remove the workflow and reduce/eliminate changes to the Makefile).

I would prefer we don't impose a requirement to change every command. I think the lib/flags/loadflags package is a convenient place to make a fairly central change.

Finally, instead of injecting compile/link flags, I think it's better to use the embed package.