Added prettier, lint-staged and husky.

Run prettier as a pre-commit hook.

Author: lukester1975

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+yarn --silent lint-staged -r

.lintstagedrc.json

@@ -0,0 +1,3 @@
+{
+  "*.{js,jsx,ts,tsx,json,css,md,html}": "prettier --write"
+}

.prettierignore

@@ -0,0 +1 @@
+/out/

package.json

@@ -331,14 +331,23 @@
     ]
   },
   "scripts": {
+    "postinstall": "husky install",
     "vscode:prepublish": "npm run compile",
     "compile": "tsc -p ./",
     "watch": "tsc -watch -p ./"
   },
   "devDependencies": {
     "@types/node": "^16.11.7",
     "@types/vscode": "^1.1.59",
+    "husky": "^8.0.3",
+    "lint-staged": "^13.2.1",
+    "prettier": "^2.8.7",
     "typescript": "^4.4.4"
   },
-  "dependencies": {}
+  "dependencies": {},
+  "prettier": {
+    "printWidth": 100,
+    "trailingComma": "all",
+    "proseWrap": "always"
+  }
 }