feat: add tree-sitter-mail

Author: neurocyte

.gitmodules

@@ -175,3 +175,6 @@
 [submodule "tree-sitter-odin"]
 	path = tree-sitter-odin
 	url = https://github.com/tree-sitter-grammars/tree-sitter-odin.git
+[submodule "tree-sitter-mail"]
+	path = tree-sitter-mail
+	url = https://github.com/stevenxxiu/tree-sitter-mail.git

build.zig

@@ -46,6 +46,7 @@ pub fn build(b: *std.Build) void {
     addParser(b, lib, "julia", null);
     addParser(b, lib, "kdl", null);
     addParser(b, lib, "lua", null);
+    addParser(b, lib, "mail", null);
     addParser(b, lib, "make", null);
     addParser(b, lib, "markdown", "tree-sitter-markdown");
     addParser(b, lib, "markdown", "tree-sitter-markdown-inline");