add prettier for JS/YAML/JSON formatting

use `.editorconfig` for settings

.editorconfig

@@ -8,3 +8,4 @@ insert_final_newline = true
 charset = utf-8
 indent_style = space
 indent_size = 2
+quote_type = single

.vscode/extensions.json

@@ -1,6 +1,7 @@
 {
   "recommendations": [
     "minecraftcommands.syntax-mcfunction",
-    "spgoding.datapack-language-server"
+    "spgoding.datapack-language-server",
+    "esbenp.prettier-vscode"
   ]
 }

.vscode/settings.json

@@ -1,6 +1,11 @@
 {
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.formatOnSave": true,
+
   "search.exclude": {
     "**/.yarn": true,
     "**/.pnp.*": true
-  }
+  },
+
+  "prettier.prettierPath": ".yarn/sdks/prettier/index.cjs"
 }

package.json

@@ -10,6 +10,7 @@
     "cpy-cli": "5.0.0",
     "nps": "5.10.0",
     "nps-utils": "1.7.0",
+    "prettier": "3.1.1",
     "rimraf": "5.0.1",
     "watch": "1.0.2"
   }

yarn.lock

@@ -1623,6 +1623,7 @@ __metadata:
     cpy-cli: 5.0.0
     nps: 5.10.0
     nps-utils: 1.7.0
+    prettier: 3.1.1
     rimraf: 5.0.1
     watch: 1.0.2
   languageName: unknown
@@ -1948,6 +1949,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"prettier@npm:3.1.1":
+  version: 3.1.1
+  resolution: "prettier@npm:3.1.1"
+  bin:
+    prettier: bin/prettier.cjs
+  checksum: e386855e3a1af86a748e16953f168be555ce66d6233f4ba54eb6449b88eb0c6b2ca79441b11eae6d28a7f9a5c96440ce50864b9d5f6356d331d39d6bb66c648e
+  languageName: node
+  linkType: hard
+
 "process-nextick-args@npm:~2.0.0":
   version: 2.0.1
   resolution: "process-nextick-args@npm:2.0.1"