No bridge fees improvements

[michalsmiarowski]

Ref: #695 Related PR: #702

Fixes padding for NoBridgeFees banner for mobile view. For that I had to change how we apply the theme in AnnoucementBanner (__css prop instead of sx) prop so that we can override the styles with style props.

For standard website view the padding remains the same.

Besides that, it adds a badge to tbtc website title

For dark mode:

TODO:

• [x] Add text informing about the fees to the Bridge page (cc @SorinQ )
• [x] Remove banner from tbtc's How It Works page once the above is applied

[github-actions[bot]]

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[SorinQ]

@michalsmiarowski Is there a reason why we changed the font on the banner?

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