parsers: Add todotxt parser

lua/nvim-treesitter/parsers.lua

@@ -411,6 +411,17 @@ list.c_sharp = {
   maintainers = { "@Luxed" },
 }
 
+list.todotxt = {
+  install_info = {
+    url = "https://github.com/arnarg/tree-sitter-todotxt.git",
+    files = { "src/parser.c" },
+    branch = "main",
+  },
+  filetype = "todotxt",
+  maintainers = { "@arnarg" },
+  experimental = true,
+}
+
 list.typescript = {
   install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-typescript",

queries/todotxt/highlights.scm

@@ -0,0 +1,6 @@
+(done_task) @comment
+(task (priority) @keyword)
+(task (date) @comment)
+(task (kv) @comment)
+(task (project) @string)
+(task (context) @type)