Fix various typos with codespell

Using 2.2.7.dev217+g10c2abcf.

Had to add `colour` to the ignore list as we used it as an alias/keyword for the
documentation of color-related APIs.
Also ignore recommendations to change `thirdparty` to either `third-party` or
`third party`, which are correct but we use the former fairly consistently.

core/extension/gdextension_interface.h

@@ -2875,7 +2875,7 @@ typedef void (*GDExtensionInterfaceEditorRemovePlugin)(GDExtensionConstStringNam
  *
  * The provided pointer can be immediately freed once the function returns.
  *
- * @param p_data A pointer to an UTF-8 encoded C string (null terminated).
+ * @param p_data A pointer to a UTF-8 encoded C string (null terminated).
  */
 typedef void (*GDExtensionsInterfaceEditorHelpLoadXmlFromUtf8Chars)(const char *p_data);
 
@@ -2887,7 +2887,7 @@ typedef void (*GDExtensionsInterfaceEditorHelpLoadXmlFromUtf8Chars)(const char *
  *
  * The provided pointer can be immediately freed once the function returns.
  *
- * @param p_data A pointer to an UTF-8 encoded C string.
+ * @param p_data A pointer to a UTF-8 encoded C string.
  * @param p_size The number of bytes (not code units).
  */
 typedef void (*GDExtensionsInterfaceEditorHelpLoadXmlFromUtf8CharsAndLen)(const char *p_data, GDExtensionInt p_size);