add init tree-sitter command

Makefile

@@ -1,11 +1,19 @@
-
+TS_CONF := $$HOME/.config/tree-sitter/config.json
 
 test: build
 	tree-sitter test
 
-highlight:
+highlight: build
 	tree-sitter highlight -t test/highlight/*.d2
 
 build:
 	tree-sitter generate
 
+init:
+	if [ ! -f "$(TS_CONF)" ]; then \
+		tree-sitter init-config; \
+	fi
+	
+	if [ -z $$(jq '."parser-directories"' $(TS_CONF) | grep $$(dirname $$PWD) ) ]; then \
+		jq ".\"parser-directories\" |= . + [\"$$(dirname $$PWD)\"]" $(TS_CONF) > $(TS_CONF); \
+	fi

flake.nix

@@ -12,6 +12,7 @@
       {
         devShells.default = pkgs.mkShell {
           packages = with pkgs; [
+            jq
             nodejs-18_x
             tree-sitter
             nodePackages.eslint