Fix casts to uint32_t in treesit.c

Fix casts to uint32_t in treesit.c

* src/treesit.c (treesit_tree_edit_1): Add assertion.
(treesit_ensure_position_synced): Add assertion.
(treesit_check_buffer_size): Change error message.
(treesit_ensure_parsed): Move treesit_check_buffer_size and
treesit_ensure_position_synced together
(treesit_read_buffer): Add assertion.
(Ftreesit_parser_set_included_ranges): Add assertion.  Signal error if
list too long.  Add check for buffer size.
(Ftreesit_parser_included_ranges): Add check for buffer size.
(Ftreesit_query_capture): Add assertion.