Implement new structure

.eslintrc.yaml

@@ -0,0 +1,39 @@
+parser: "@typescript-eslint/parser"
+env:
+  browser: true
+  es6: true   # Map, etc.
+  mocha: true
+  node: true
+
+parserOptions:
+  ecmaVersion: 2018
+  sourceType: module
+  ecmaFeatures:
+    jsx: true
+
+extends:
+  - eslint:recommended
+  - plugin:@typescript-eslint/recommended
+  - plugin:import/recommended
+  - plugin:import/typescript
+  - plugin:react/recommended
+  - plugin:prettier/recommended
+  - prettier # Removes eslint rules that conflict with prettier.
+  - prettier/@typescript-eslint # Remove conflicts again.
+
+plugins:
+  - react-hooks
+
+# Need to set this explicitly for the eslint-plugin-react.
+settings:
+  react:
+    version: detect
+
+rules:
+  # For overloads.
+  no-dupe-class-members: off
+
+  # https://www.npmjs.com/package/eslint-plugin-react-hooks
+  react-hooks/rules-of-hooks: error
+
+  react/prop-types: off # We use Typescript to verify prop types.