feat: minga standalone — compartición P2P soberana con montaje FUSE content-addressed (front-door, git-dep al monorepo)

Front-door limpio: solo crates del dominio; Llimphi y lo fundacional por
git-dep del monorepo gioser.git. cargo check pasa (7 crates, 0 errores).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

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+# minga
+
+> Sovereign P2P sharing with a content-addressed FUSE mount, in Rust.
+
+`minga` (Quechua: *collective work*) shares content peer-to-peer: multi-bundle packs, content-addressed (BLAKE3) storage, and a FUSE filesystem so shared content mounts as real files. Discovery and transport ride the `card`/`chasqui` networking layer (relay, dcutr, autonat — NAT-traversal included).
+
+## How dependencies work
+Front-door repo: only `minga-*` crates here. The `card` identity primitives, shared leaves and UI are git-dependencies of the [`gioser`](https://gitea.gioser.net/sergio/gioser) monorepo (source of truth).
+
+## License
+MIT. Part of the [gioser](https://gitea.gioser.net/sergio/gioser) suite.