Add support for chess Portable Game Notation (PGN) (#18)

commit a8e0787
Author: Roland Walker <walker@pobox.com>
Date:   Thu Jun 24 17:46:48 2021 -0400

    add support for chess Portable Game Notation (PGN)

Author: ubolonton

.gitmodules

@@ -151,3 +151,8 @@
 	update = none
     ignore = dirty
     branch = master
+[submodule "repos/pgn"]
+	path = repos/pgn
+	url = https://github.com/rolandwalker/tree-sitter-pgn.git
+	ignore = dirty
+	branch = master

queries/pgn/highlights.scm

@@ -0,0 +1,22 @@
+[
+ (annotation)
+ (inline_comment)
+ (rest_of_line_comment)
+ (old_style_twic_section_comment)
+] @comment
+
+(tagpair_delimiter_open) @punctuation.bracket
+(tagpair_delimiter_close) @punctuation.bracket
+(tagpair_key) @type
+(tagpair tagpair_value_delimiter: (double_quote) @string)
+(tagpair_value_contents) @string
+
+(movetext (move_number) @function)
+(movetext (san_move) @function)
+
+(variation_delimiter_open) @operator
+(variation_delimiter_close) @operator
+(variation_movetext variation_san_move: (san_move) @operator)
+(variation_movetext variation_move_number: (move_number) @operator)
+
+(result_code) @property

repos/pgn

@@ -111,6 +111,7 @@ See `tree-sitter-langs-repos'."
                 (ocaml-mode      . ocaml)
                 (php-mode        . php)
                 (python-mode     . python)
+                (pygn-mode       . pgn)
                 (rjsx-mode       . javascript)
                 (ruby-mode       . ruby)
                 (rust-mode       . rust)