docs: update Typescript minimum version: v7 + link

[davidlj95]

Summary

Updates Typescript minimum version docs:

• Migration guide link is not turned into a link. Adding explicit md link syntax.
• Docs talk about latest version being 6.x whilst latest are 7.x. Update accordingly
• Add section about latest version 7.x
• Use of / of the consistently

About 7.x support:

I've seen typescript dependency is pinned to 5.3.3 in package.json. Update & pinning strategy changed in v7 from ~4.1 to 5.3.3. Dep is no longer a range like but a specific pinned version. Reason stated in the strategy change PR is that Typescript introduces breaking changes in minor versions. So claiming support for 5.3.x given API breaking changes shouldn't happen in patch releases. But also expose the fact that greater minor versions may be used though things may break.

Requirements (place an x in each [ ])

• [x] I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• [x] I've read and agree to the Code of Conduct.

[davidlj95]

This is excellent, thanks so much for this and your other PRs! Left a minor suggestion for a typo.

Thanks!! ☺️ 🫶 aaand done 🎉