style: enforce prettier rules in linter

.eslintrc.js

@@ -0,0 +1,10 @@
+module.exports = {
+  plugins: ["prettier"],
+  extends: ["react-app"],
+  rules: {
+    "prettier/prettier": "error",
+    "no-unused-vars": "off",
+    "no-loop-func": "off",
+    "no-restricted-globals": "off"
+  }
+};

.prettierrc.json

@@ -0,0 +1,4 @@
+{
+    "singleQuote": false,
+    "trailingComma": "none"
+}

package.json

@@ -67,18 +67,6 @@
     "shelljs": "^0.8.2",
     "source-map-support": "^0.5.21"
   },
-  "eslintConfig": {
-    "extends": "react-app",
-    "rules": {
-      "no-unused-vars": "off",
-      "no-loop-func": "off",
-      "no-restricted-globals": "off"
-    }
-  },
-  "prettier": {
-    "singleQuote": true,
-    "trailingComma": "none"
-  },
   "resolutions": {
     "@babel/preset-env": "^7.15.1",
     "@babel/core": "^7.15.1",

packages/loot-core/package.json

@@ -45,6 +45,7 @@
     "buffer": "^5.5.0",
     "damerau-levenshtein": "^1.0.4",
     "date-fns": "2.0.0-alpha.27",
+    "eslint-plugin-prettier": "^3.1.4",
     "esm": "^3.0.82",
     "fake-indexeddb": "^3.1.3",
     "fast-check": "^2.11.0",
@@ -58,6 +59,7 @@
     "mock-require": "^3.0.2",
     "murmurhash": "^0.0.2",
     "perf-deets": "^1.0.15",
+    "prettier": "^1.19.1",
     "sanitize-filename": "^1.6.1",
     "search-query-parser": "^1.3.0",
     "source-map": "^0.7.3",

yarn.lock

@@ -7445,6 +7445,13 @@ eslint-plugin-jsx-a11y@6.1.2:
     has "^1.0.3"
     jsx-ast-utils "^2.0.1"
 
+eslint-plugin-prettier@^3.1.4:
+  version "3.4.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-3.4.1.tgz#e9ddb200efb6f3d05ffe83b1665a716af4a387e5"
+  integrity sha512-htg25EUYUeIhKHXjOinK4BgCcDwtLHjqaxCDsMy5nbnUMkKFvIhMVCp+5GFUXQ4Nr8lBsPqtGAqBenbpFqAA2g==
+  dependencies:
+    prettier-linter-helpers "^1.0.0"
+
 eslint-plugin-react@7.11.1:
   version "7.11.1"
   resolved "https://registry.yarnpkg.com/eslint-plugin-react/-/eslint-plugin-react-7.11.1.tgz#c01a7af6f17519457d6116aa94fc6d2ccad5443c"
@@ -7871,6 +7878,11 @@ fast-deep-equal@^3.1.1, fast-deep-equal@^3.1.3:
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz#3a7d56b559d6cbc3eb512325244e619a65c6c525"
   integrity sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==
 
+fast-diff@^1.1.2:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/fast-diff/-/fast-diff-1.2.0.tgz#73ee11982d86caaf7959828d519cfe927fac5f03"
+  integrity sha512-xJuoT5+L99XlZ8twedaRf6Ax2TgQVxvgZOYoPKqZufmJib0tL2tegPBOZb1pVNgIhlqDlA0eO0c3wBvQcmzx4w==
+
 fast-glob@^2.2.0, fast-glob@^2.2.2:
   version "2.2.7"
   resolved "https://registry.yarnpkg.com/fast-glob/-/fast-glob-2.2.7.tgz#6953857c3afa475fff92ee6015d52da70a4cd39d"
@@ -14059,7 +14071,14 @@ prepend-http@^2.0.0:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-2.0.0.tgz#e92434bfa5ea8c19f41cdfd401d741a3c819d897"
   integrity sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc=
 
-prettier@^1.14.2, prettier@^1.18.1:
+prettier-linter-helpers@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/prettier-linter-helpers/-/prettier-linter-helpers-1.0.0.tgz#d23d41fe1375646de2d0104d3454a3008802cf7b"
+  integrity sha512-GbK2cP9nraSSUF9N2XwUwqfzlAFlMNYYl+ShE/V+H8a9uNl/oUqB1w2EL54Jh0OlyRSd8RfWYJ3coVS4TROP2w==
+  dependencies:
+    fast-diff "^1.1.2"
+
+prettier@^1.14.2, prettier@^1.18.1, prettier@^1.19.1:
   version "1.19.1"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
   integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==