Add editor configuration files for 4-space indentation

Co-authored-by: leinelissen <10154841+leinelissen@users.noreply.github.com>

.editorconfig

@@ -0,0 +1,25 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+trim_trailing_whitespace = true
+
+# TypeScript, JavaScript, JSON, and JSX files
+[*.{ts,tsx,js,jsx,json}]
+indent_style = space
+indent_size = 4
+
+# YAML files
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+# Markdown files
+[*.md]
+trim_trailing_whitespace = false

.eslintrc.js

@@ -1,4 +1,9 @@
 module.exports = {
     root: true,
     extends: '@react-native',
+    rules: {
+        // Enforce 4-space indentation
+        'indent': ['error', 4, { 'SwitchCase': 1 }],
+        '@typescript-eslint/indent': ['error', 4, { 'SwitchCase': 1 }],
+    },
 };

.prettierrc

@@ -0,0 +1,9 @@
+{
+    "tabWidth": 4,
+    "useTabs": false,
+    "semi": true,
+    "singleQuote": true,
+    "trailingComma": "es5",
+    "printWidth": 100,
+    "arrowParens": "always"
+}