Fix various typos (#2607)

* Fix various typos

Found via `codespell -q 3 -L acount,clen,dout`

* Trunk reformatting

---------

Co-authored-by: code8buster <communismisgreat@national.shitposting.agency>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mqtt/JSONValue.cpp

@@ -282,7 +282,7 @@ JSONValue *JSONValue::Parse(const char **data)
         return NULL;
     }
 
-    // Ran out of possibilites, it's bad!
+    // Ran out of possibilities, it's bad!
     else {
         return NULL;
     }