Move some tooling config (eslintignore, prettierrc) to package.json

To limit amount of dotfiles at repo root

.eslintignore

@@ -1,6 +0,0 @@
-node_modules/**
-app/node_modules/**
-app/lib/**
-lib/**
-built-tests/**
-coverage/**

.eslintrc.js

@@ -24,4 +24,13 @@ module.exports = {
     '@typescript-eslint/no-unsafe-member-access': 'off',
     '@typescript-eslint/no-unsafe-return': 'off',
   },
+  // https://eslint.org/docs/user-guide/configuring/ignoring-code#ignorepatterns-in-config-files
+  ignorePatterns: [
+    "node_modules/**",
+    "app/node_modules/**",
+    "app/lib/**",
+    "lib/**",
+    "built-tests/**",
+    "coverage/**",
+  ]
 };

.prettierrc.yaml

@@ -1,3 +0,0 @@
-arrowParens: always
-singleQuote: true
-trailingComma: all

package.json

@@ -93,5 +93,10 @@
       "<rootDir>/app/src.*",
       "<rootDir>/src.*"
     ]
+  },
+  "prettier": {
+    "arrowParens": "always",
+    "singleQuote": true,
+    "trailingComma": "all"
   }
 }