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/github_driver/event.rs

@@ -0,0 +1,44 @@
+use std::{fs, path::PathBuf};
+
+use blue_build_utils::{constants::GITHUB_EVENT_PATH, get_env_var};
+use miette::{IntoDiagnostic, Result};
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize, Clone)]
+pub(super) struct Event {
+    pub repository: EventRepository,
+    // pub base: Option<EventRefInfo>,
+    pub head: Option<EventRefInfo>,
+
+    #[serde(alias = "ref")]
+    pub commit_ref: Option<String>,
+}
+
+impl Event {
+    pub fn try_new() -> Result<Self> {
+        get_env_var(GITHUB_EVENT_PATH)
+            .map(PathBuf::from)
+            .and_then(|event_path| {
+                serde_json::from_str::<Self>(&fs::read_to_string(event_path).into_diagnostic()?)
+                    .into_diagnostic()
+            })
+    }
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub(super) struct EventRepository {
+    pub default_branch: String,
+    pub owner: EventRepositoryOwner,
+    pub html_url: String,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub(super) struct EventRepositoryOwner {
+    pub login: String,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub(super) struct EventRefInfo {
+    #[serde(alias = "ref")]
+    pub commit_ref: String,
+}