chore: UNI-287 Set up linter and formatter (#291)

* install prettier and add configs, uninstall eslint-plugin-prettier for backend

* move eslint to dev dependencies in frontend

* install and configure prettier and eslint-config-prettier

* install eslint for migration package

* install and configure prettier for migration package

* add lint command to package.json in migration

backend/.eslintrc.js

@@ -6,7 +6,7 @@ module.exports = {
   },
   extends: [
     "plugin:@typescript-eslint/recommended", // Uses the recommended rules from the @typescript-eslint/eslint-plugin
-    "plugin:prettier/recommended", // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
+    "prettier",
   ],
   rules: {
     // Place to specify ESLint rules. Can be used to overwrite rules specified from the extended configs

backend/.prettierignore

@@ -0,0 +1,2 @@
+build
+coverage

backend/.prettierrc

@@ -0,0 +1,5 @@
+{
+  "singleQuote": false,
+  "tabWidth": 2,
+  "trailingComma": "all"
+}