fix(fuselage): wrap PropsVariation table to prevent mobile overflow

[DeveloperVaibhav1]

The table in Storybook's Docs tab overflows horizontally on mobile (~375px) —
it just goes off screen edge.

Wrapped the is='table' Box with an outer Box using overflowX='auto' so it
scrolls sideways instead. Also noticed the original had two style props on
the same element so borderCollapse: 'collapse' was never actually applying —
fixed that too.

Couldn't test in Storybook locally due to an existing build error in
@rocket.chat/icons (SVG parsing issue, unrelated to this). Happy to verify
once that's resolved.

Closes #1825

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Latest commit: cad814d

The changes in this PR will be included in the next version bump.

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Name	Type
@rocket.chat/fuselage	Patch

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