Fix typos with codespell

Using codespell 2.2-dev from current git.

Added `misc/scripts/codespell.sh` to make it easier to run it once in a
while and update the skip and ignore lists.

(cherry picked from commit 1bdb82c64e)

editor/editor_file_system.cpp

@@ -1544,7 +1544,7 @@ Error EditorFileSystem::_reimport_group(const String &p_group_file, const Vector
 			for (List<String>::Element *E = sk.front(); E; E = E->next()) {
 				String param = E->get();
 				Variant value = config->get_value("params", param);
-				//override with whathever is in file
+				//override with whatever is in file
 				source_file_options[p_files[i]][param] = value;
 			}
 		}