fix most typos, add crate-ci/typos to CI (#2653)

* fix most typos, add crate-ci/typos to CI

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/cli/src/serve/watcher.rs

@@ -248,7 +248,7 @@ impl Watcher {
     }
 
     /// Ensure the changes we've received from the queue are actually legit changes to either assets or
-    /// rust code. We don't care about changes otherwise, unless we get a signle elsewhere to do a full rebuild
+    /// rust code. We don't care about changes otherwise, unless we get a signal elsewhere to do a full rebuild
     pub fn pending_changes(&mut self) -> bool {
         !self.queued_events.is_empty()
     }