feat(bridge-ui): improve accessibility

[jscriptcoder]

The idea here is to identify accessibility problems and fix them in order to widen our target audience.

Some of the points to cover:

1. Users should be able to easily read content: font size, color and contrast (Requires design)
2. Users should be able to easily navigate the bridge via keyboard
3. Content should be readable by screen readers: semantic html, aria attributes and roles.

[jscriptcoder]

We might want to wait for design to work on this one. Markup will most likely change.

[jscriptcoder]

PRs covering this topic:

• feat(bridge-ui): Tabs Component #13380

[dionysuzx]

@jscriptcoder should we break this out into some subtasks you think?

[jscriptcoder]

We can close this one, @d1onys1us , since accessibility will be taken care of as we work on the new UI