gl-util: Add a new crate that holds GL utilities

We wan't to be able to use the error framework across diferent
greenlight crates. The util crate is a good place to store some common
functionalities.

Signed-off-by: Peter Neuroth <[email protected]>

Author: nepet

Cargo.lock

@@ -18,6 +18,7 @@ members = [
     "libs/gl-plugin",
     "libs/gl-signerproxy",
     "libs/gl-cli",
+    "libs/gl-util",
 ]
 
 [workspace.dependencies]