Replace Git submodules with release-compatible alternatives for first stable release

[jserv]

rv32emu has been developed collaboratively on GitHub and relies on several Git submodules. As we prepare for v1.0, our first stable release, we need to address a compatibility issue: GitHub release tarballs (API Content) do not include submodules.

To ensure a complete and functional release package, we should:

1. Identify all components currently fetched via Git submodules;
2. Develop alternative methods to include these components in the release tarball;
3. Update our build process to use these alternatives when working with a release archive.

This change will maintain rv32emu's functionality whether it's obtained through Git clone or a release download.

Reference:

• git-archive-all.sh: A bash shell script wrapper for git-archive that archives a git superproject and its submodules, if it has any.

[jserv]

Close via https://github.com/sysprog21/rv32emu/releases/tag/v1.0