radicle-git init

Port over all git relevant parts of the radicle-link repository[0].
The packages that are kept are:
* git-ext
* git-ref-format
* git-trailers
* link-git
* macros
* std-ext
* test -- only the portions that test the above

The development and testing scripts are also added for local and CI
testing.

[0]: https://github.com/radicle-dev/radicle-link/
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>

git-ref-format/core/src/lib.rs

@@ -0,0 +1,25 @@
+// Copyright © 2021 The Radicle Link Contributors
+//
+// This file is part of radicle-link, distributed under the GPLv3 with Radicle
+// Linking Exception. For full terms see the included LICENSE file.
+
+mod check;
+pub use check::{ref_format as check_ref_format, Error, Options};
+
+mod deriv;
+pub use deriv::{Namespaced, Qualified};
+
+pub mod lit;
+
+pub mod name;
+#[cfg(feature = "percent-encoding")]
+pub use name::PercentEncode;
+pub use name::{Component, RefStr, RefString};
+
+pub mod refspec;
+pub use refspec::DuplicateGlob;
+
+#[cfg(feature = "minicbor")]
+mod cbor;
+#[cfg(feature = "serde")]
+mod serde;