feat(e2e-connector-test): add burner wallet tests FE-441

[nelitow]

• Closes #211

This PR creates simple tests for the Burner Wallet connector in the react-app. The tests are only regarding stability of the connection. No transfer and increment tests are done at this moment.

Tests:

• [x] should connect and show fuel address
• [x] should connect, disconnect, and reconnect
• [x] should connect, refresh and stay connected
• [x] should connect, disconnect, refresh and stay disconnected
• [ ] should execute transfer
• [ ] should execute increment (contract call)