feat: connect ui (#2721)

## Describe your changes

Contributes to https://linear.app/nango/issue/NAN-1703/create-ui

- Setup the folder for the new Connect UI
This is just this to avoid massive PR later.

```sh
npm run -w @nangohq/connect-ui dev
```

.eslintrc

@@ -193,6 +193,35 @@
                 // unnecessary when bundling
                 "import/extensions": "off"
             }
+        },
+        {
+            "files": [
+                "packages/connect-ui/**/*.tsx"
+            ],
+            "plugins": [
+                "react",
+                "react-hooks"
+            ],
+            "extends": [
+                "plugin:react-hooks/recommended",
+                "plugin:react/recommended",
+                "plugin:react/jsx-runtime",
+            ],
+            "env": {
+                "browser": true,
+                "es6": true,
+                "node": false
+            },
+            "parserOptions": {
+                "ecmaVersion": 2018,
+                "sourceType": "module",
+                "ecmaFeatures": {
+                    "impliedStrict": true,
+                    "jsx": true
+                },
+                "project": "tsconfig.json"
+            },
+            "rules": {}
         }
     ]
 }

Dockerfile

@@ -32,6 +32,7 @@ COPY packages/scheduler/package.json ./packages/scheduler/package.json
 COPY packages/server/package.json ./packages/server/package.json
 COPY packages/shared/package.json ./packages/shared/package.json
 COPY packages/types/package.json ./packages/types/package.json
+COPY packages/connect-ui/package.json ./packages/connect-ui/package.json
 COPY packages/utils/package.json ./packages/utils/package.json
 COPY packages/webapp/package.json ./packages/webapp/package.json
 COPY packages/webhooks/package.json ./packages/webhooks/package.json
@@ -63,14 +64,15 @@ ENV REACT_APP_PUBLIC_SENTRY_KEY $sentry_key
 
 # Build the frontend
 RUN true \
-  && npm run -w @nangohq/webapp build
+  && npm run -w @nangohq/webapp build \
+  && npm run -w @nangohq/connect-ui build
 
 # Clean src
 RUN true \
   && rm -rf packages/*/src \
   && rm -rf packages/*/lib \
-  && rm -rf packages/webapp/public \
-  && rm -rf packages/webapp/node_modules
+  && rm -rf packages/*/public \
+  && rm -rf packages/*/node_modules
 
 # Clean dev dependencies
 RUN true \