feature/translations and ux improvements

[sgobotta]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

This PR provides:

• Add a custom tailwind media query
• Add some reusable styles for the checkout floating button
• Update title font size
• Fix a few translations
• Update checkout font sizes for different screens

No related issue

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Documentation update

None of the above. Just UI/UX improvements

Checklist

The following options in bold are required for a PR approval. Please check the boxes only if necessary, it help us minimizing the reviewing process.

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[coveralls]

Pull Request Test Coverage Report for Build c1e21e93d9ebfb1cc0e11cc9b4fadd6f0e887d62-PR-53

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 6 unchanged lines in 1 file lost coverage.
• Overall coverage remained the same at 60.042%

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Files with Coverage Reduction	New Missed Lines	%
//lib/ex_commerce_web/live/checkout_live/components/cart_component.ex	6	0.0%

Totals
Change from base Build ee021e9ae3c13d6867fd97f6df1e09fc1ee426ba:	0.0%
Covered Lines:	1136
Relevant Lines:	1892

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💛 - Coveralls