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>

examples/optional_props.rs

@@ -31,7 +31,7 @@ fn app() -> Element {
             e: "asd".to_string(),
         }
 
-        // `b` and `e` are ommitted
+        // `b` and `e` are omitted
         Button {
             a: "asd".to_string(),
             c: "asd".to_string(),