add golang bindings #127

Job	Run time
Validate queries (markdown)	19s
Validate queries (markdown-inline)	35s
Test parsers (macos-latest)	35s
Test parsers (ubuntu-latest)	23s
Fuzz parsers (tree-sitter-markdown)	6s
Fuzz parsers (tree-sitter-markdown-inline)	6s
Test parsers (windows-latest)	47s
	2m 51s

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