refactor: Create SigningDriver and CiDriver (#197)

This also includes a new `login` command. The signing and CI logic is now using the Driver trait system along with a new experimental sigstore signing driver. New static macros have also been created to make implementation management easier for `Command` usage and `Driver` trait implementation calls.

---------

Co-authored-by: xyny <60004820+xynydev@users.noreply.github.com>

process/drivers/local_driver.rs

@@ -0,0 +1,43 @@
+use log::trace;
+use miette::bail;
+
+use super::{CiDriver, Driver};
+
+pub struct LocalDriver;
+
+impl CiDriver for LocalDriver {
+    fn on_default_branch() -> bool {
+        trace!("LocalDriver::on_default_branch()");
+        false
+    }
+
+    fn keyless_cert_identity() -> miette::Result<String> {
+        trace!("LocalDriver::keyless_cert_identity()");
+        bail!("Keyless not supported");
+    }
+
+    fn oidc_provider() -> miette::Result<String> {
+        trace!("LocalDriver::oidc_provider()");
+        bail!("Keyless not supported");
+    }
+
+    fn generate_tags(recipe: &blue_build_recipe::Recipe) -> miette::Result<Vec<String>> {
+        trace!("LocalDriver::generate_tags({recipe:?})");
+        Ok(vec![format!("local-{}", Driver::get_os_version(recipe)?)])
+    }
+
+    fn generate_image_name(recipe: &blue_build_recipe::Recipe) -> miette::Result<String> {
+        trace!("LocalDriver::generate_image_name({recipe:?})");
+        Ok(recipe.name.trim().to_lowercase())
+    }
+
+    fn get_repo_url() -> miette::Result<String> {
+        trace!("LocalDriver::get_repo_url()");
+        Ok(String::new())
+    }
+
+    fn get_registry() -> miette::Result<String> {
+        trace!("LocalDriver::get_registry()");
+        Ok(String::new())
+    }
+}