Add git-swarm to Tools

[crtahlin]

Adds git-swarm to the Tools section.

[git-swarm](https://github.com/crtahlin/git-swarm) - Git remote helper for Swarm — `git push bzz://` and `git clone bzz://`, with refs in signed feeds and a static web viewer.

What it is. A Git remote helper that makes Swarm a first-class Git remote: git push bzz://… and git clone bzz://… work with stock Git once the helper is on PATH. Packfiles are stored as content-addressed Swarm chunks; the mutable "current tip of main" problem is solved with a signed Swarm feed, which is the one thing Git itself does not provide. Ships git-remote-bzz and git-remote-swarm binaries.

Status, stated plainly. Phase 0 (clone a repo from a public gateway with stock Git, no plugin) and Phase 1 (the remote helper, with a documented on-Swarm format spec) are both complete, and the static web viewer works. Git-native issues, ACT private repos and ecosystem mirroring are planned and marked as such in the README. The repository describes itself as a proof of concept; the push/clone path is nonetheless working and published, not aspirational.

Verification. Both published feeds resolve today: the viewer at 02a7f5a1… returns the rendered viewer, and the repository feed at de4a9c97… returns valid swarm-git/1 JSON with refs. These survived the expiry of the project's original postage batch because the content was republished onto a durable batch.

Checklist

• One item, one PR.
• Public, not archived, MIT LICENSE, last push 2026-08-10.
• Link resolves; description is 122 characters, sentence case, and describes this repository.
• Not already listed in README.md / archived.md; no open PR or issue for it.
• awesome-lint passes: 0 errors, and only the two spelling warnings already present on main.

Disclosure: I am a CODEOWNER of this repository and this is my own project, so I will not be reviewing it — it needs @Cafe137 or @yjkellyjoo.

[yjkellyjoo]

cool!