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/proxy.rs

@@ -176,7 +176,7 @@ mod test {
                 .unwrap();
         });
 
-        // Expose *just* the fileystem web server's address
+        // Expose *just* the filesystem web server's address
         server_handle_handle.listening().await.unwrap().to_string()
     }
 

packages/cli/src/serve/server.rs

@@ -471,7 +471,7 @@ fn no_cache(
     let mut response = response.into_response();
 
     // If there's a 404 and we're supposed to index on 404, upgrade that failed request to the index.html
-    // We migth want to isnert a header here saying we *did* that but oh well
+    // We might want to isnert a header here saying we *did* that but oh well
     if response.status() == StatusCode::NOT_FOUND && index_on_404 {
         let body = Body::from(std::fs::read_to_string(out_dir.join("index.html")).unwrap());
 

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()
     }