Add template files required to make eslint actually work

Author: azimux

templates/.env

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+REACT_APP_FOOBARA_GLOBAL_URL_BASE=http://localhost:9292

templates/.eslintrc.js

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+module.exports = {
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": [
+        "standard-with-typescript",
+        "plugin:react/recommended"
+    ],
+    "overrides": [
+        {
+            "env": {
+                "node": true
+            },
+            "files": [
+                ".eslintrc.{js,cjs}"
+            ],
+            "parserOptions": {
+                "sourceType": "script"
+            }
+        }
+    ],
+    parser: '@typescript-eslint/parser',
+    "parserOptions": {
+        "ecmaVersion": "latest",
+        project: ['./tsconfig.json'],
+        "sourceType": "module"
+    },
+    "plugins": [
+        "react"
+    ],
+    settings: {
+        react: {
+            version: "detect"
+        },
+    },
+    "rules": {
+        "@typescript-eslint/explicit-function-return-type": "off",
+        "@typescript-eslint/triple-slash-reference": "off",
+        "@typescript-eslint/explicit-function-return-type": "off",
+        "@typescript-eslint/no-floating-promises": "off",
+    }
+}

templates/src/empty_typescript_react_project.rb.erb

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+{
+  "compilerOptions": {
+    "target": "es6",
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "noFallthroughCasesInSwitch": true,
+    "module": "CommonJS",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx"
+  },
+  "include": [
+    "src"
+  ]
+}