Add shareable linter configs.

.stylelintrc.json

@@ -1,9 +0,0 @@
-{
-  "extends": [
-    "stylelint-config-standard-scss"
-  ],
-  "rules": {
-    "no-descending-specificity": null,
-    "string-quotes": "single"
-  }
-}

package.json

@@ -22,6 +22,9 @@
     "webextension-polyfill": "^0.10.0"
   },
   "devDependencies": {
+    "@bauke/eslint-config": "^0.1.2",
+    "@bauke/prettier-config": "^0.1.2",
+    "@bauke/stylelint-config": "^0.1.2",
     "@preact/preset-vite": "^2.5.0",
     "@types/babel__core": "^7.20.0",
     "@types/node": "^18.15.11",
@@ -69,6 +72,10 @@
       "html"
     ]
   },
+  "prettier": "@bauke/prettier-config",
+  "stylelint": {
+    "extends": "@bauke/stylelint-config"
+  },
   "xo": {
     "overrides": [
       {
@@ -78,6 +85,7 @@
         }
       }
     ],
+    "extends": "@bauke/eslint-config",
     "prettier": true,
     "rules": {
       "@typescript-eslint/consistent-type-definitions": "off",