nix: Nix flake maintenance

The nix flake's checks were failing for various reasons. The following fixes are
applied to get it up to date again.

- Update to release-24.11, since `crane` requires it – also to keep up-to-date
- Add `.json` to the source filters to allow for testing patch migration
- Ensure that the `rad` and `git-remote-rad` binaries are built for the nextest
  check. N.b. the binaries need to be in the target dir of `radicle-cli` since
  that is where the nextest check runs from.
- Add `cargo-audit` and `cargo-deny`, to the devShell, to allow for running those
  tools locally
- Bump `gix-path` to 0.10.11 to avoid a vulnerability[^0]

[^0]: https://rustsec.org/advisories/RUSTSEC-2024-0371

deny.toml

@@ -48,6 +48,7 @@ allow = [
     "MIT",
     "Apache-2.0",
     "Unicode-DFS-2016",
+    "Unicode-3.0",
     "BSD-3-Clause",
     "MPL-2.0"
 ]