feat(Grid): add update checker

[kyrie25]

• Feature update:
  Now checks for new updates every time Marketplace is opened and notifies the user via a button that leads to the repository:
  

• Styling update:
  Merge search bar onto header

• TODO:

• Use an SVG instead of available! for styling purposes(?)

• Implement spcr-whats-new and manage changelogs

[kyrie25]

Implemented spcr-whats-new to display a changelog modal every time it is updated. Should probably update the changelog to include this PR as well once it is merged.

Important note: Current version of Marketplace is not a valid SemVer version (I'm pretty sure it is, but it just doesn't accept version numbers below 1.0.0 🤷), so in order to trigger the modal, the version inside the Changelog component must be bumped simultaneously as the version number of Marketplace.
It is a valid SemVer number, I messed it up on my end but it's working as expected.

[kyrie25]

Now uses GitHub commit log as changelog. Will need to squash commits in the future to reduce list length.
Need to change last commit timestamp on constant.ts so pinpoint when the version was bumped and the changes afterwards.