feat(a11y): inline errors newServerView

[OtavioStasiak]

Proposed changes

Create inline error on avatar url input in newServerView.

Issue(s)

https://rocketchat.atlassian.net/browse/MA-235

How to test or reproduce

• Open the app (newServerView);
• Fill "Workspace URL" input with invalid url;
• Press "Connect" button;

Screenshots

Before	After

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments

[diegolmello]

There's a huge refactor to function components and the inline error.
I think we should split this PR into two.