Create a basic gix-error crate to forward exn

Author: Byron

Cargo.lock

@@ -229,6 +229,7 @@ members = [
     "gix-trace",
     "gix-commitgraph",
     "gix-chunk",
+    "gix-error",
     "gix-quote",
     "gix-object",
     "gix-glob",

Cargo.toml

@@ -141,6 +141,7 @@ is usable to some extent.
   * [gix-dir](https://github.com/GitoxideLabs/gitoxide/blob/main/crate-status.md#gix-dir)
   * [gix-merge](https://github.com/GitoxideLabs/gitoxide/blob/main/crate-status.md#gix-merge)
   * [gix-shallow](https://github.com/GitoxideLabs/gitoxide/blob/main/crate-status.md#gix-shallow)
+  * [gix-error](https://github.com/GitoxideLabs/gitoxide/blob/main/crate-status.md#gix-error)
   * `gitoxide-core`
 * **very early**  _(possibly without any documentation and many rough edges)_
   * [gix-blame](https://github.com/GitoxideLabs/gitoxide/blob/main/crate-status.md#gix-blame)

README.md

@@ -572,8 +572,12 @@ A mechanism to associate metadata with any object, and keep revisions of it usin
      - note that it's less critical to support it as `gitoxide` allows access but prevents untrusted configuration to become effective.
 
 ### gix-date
-* [ ] parse git dates
-* [ ] serialize `Time`
+* [x] parse git dates
+* [x] serialize `Time`
+
+### gix-error
+
+A basic crate for comon error types and utilities, changed as needed to replace `thiserror`.
 
 ### gix-credentials
 * [x] launch git credentials helpers with a given action

crate-status.md

@@ -0,0 +1,19 @@
+lints.workspace = true
+
+[package]
+name = "gix-error"
+version = "0.0.0"
+repository = "https://github.com/GitoxideLabs/gitoxide"
+license = "MIT OR Apache-2.0"
+description = "A crate of the gitoxide project to provide common errors and error-handling utilities"
+authors = ["Sebastian Thiel <sebastian.thiel@icloud.com>"]
+edition = "2021"
+include = ["src/**/*", "LICENSE-*"]
+rust-version = "1.82"
+
+[lib]
+doctest = false
+
+[dependencies]
+exn = "0.2.1"
+

gix-error/Cargo.toml

@@ -0,0 +1 @@
+../LICENSE-APACHE

gix-error/LICENSE-APACHE

@@ -0,0 +1 @@
+../LICENSE-MIT

gix-error/LICENSE-MIT

@@ -0,0 +1,7 @@
+//! Common error types and utilities for error handling.
+#![deny(missing_docs, unsafe_code)]
+
+pub use exn::Exn;
+/// A result type to hide the [Exn] error wrapper.
+pub use exn::Result;
+pub use exn::ResultExt;