[Catalog] Use light/dark snapshot version

[aabidsofi19]

Description

This PR fixes #
Use the version of snapshot based on theme

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[aabidsofi19]

@leecalcote

[leecalcote]

Ready to go?

[sudhanshutech]

@aabidsofi19 merge conflicts...
Please remove the changes in gemfile(it will override the ruby configs) and .jekyll-metadata

[sudhanshutech]

oops, seems like screenshot are not visible in front page but it is inside the modal. Will you confirm @aabidsofi19 ?

[aabidsofi19]

@MUzairS15 if you would confirm here

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[leecalcote]

Whee! @aabidsofi19 😁