feat: update connectors ui

[luizstacio]

Update Connectors UI on the react package to work without fuel-ui dependencies.

In this PR;

• Update Connectors UI to work without fuel-ui
• For better portability, I have chosen to;
  • Add styled-components for adding styling. The approach was selected to avoid page CSS to affect the SDK UI.
  • All icons are created using JSX components instead of the path approach.
  • Add CSS vars for enabling theming. This allows applications to change colors and spacing.
  • To allow better customization with fewer variables, all spacing and margins are based on em taking the font-size of the root container as a reference.
• Fix some of the compatibility issues for the new SDK approach.
• Create an Example Application using CRA. This will be useful for the documentation and help communicate how to implement a DApp.
• Fix E2E tests to work with the new Connectors UI. In this way, we have at least some coverage of it. Previously, we didn't have tests covering this specific component.
• Add exports on the package.json of the react package. This is a pain in development as it now requires the package to be built before use, but it is the only way to ensure the correct packing of the UI to test it.

Kwon issues;

• Documentation needs to be updated and will be improved on the next PR.
• Some of the documentation can be broken also.

Next Steps;

• Work on the documentation;
• Integrate the current Connectors UI on the Fuel Bridge.

example-app.mov

closes FE-8

[linear]

FE-8 Fuel Connector V2 -> Light Weight UI

To enable people to use our connector UI, it is required that the UI is very light and does not have dependencies on external—UI libraries.

For this task, we should update the current UI using fuel-ui to use plain CSS but following the same design we already have.

[github-actions]

Coverage report for ./packages/app

St.❔	Category	Percentage	Covered / Total
🟡	Statements	67.67%	3383/4999
🔴	Branches	44.52%	618/1388
🔴	Functions	51.25%	716/1397
🟡	Lines	68.24%	3259/4776

Test suite run success

241 tests passing in 73 suites.

Report generated by 🧪jest coverage report action from d0c1d9b