CLIENT-SPECIFICATION: add automatic platform detection suggestion, fix Markdown syntax

[kbdharun]

• The page(s) follow the content guidelines.
• The PR title conforms to the recommended templates.

Changes

• Update/Fix Markdown Syntax throughout the page to fix markdown-lint errors.
• Add @pixelcmtd's suggestion to automatically detect new platforms from the pages directory.

[acuteenvy]

list it as a supported platform in --platform option

Where do you think it should be listed?

[acuteenvy]

Since you merged #10730, we should probably bump the version.

[kbdharun]

Since you merged #10730, we should probably bump the version.

Agreed, I am planning to include this suggestion too (for this one we don't need to wait as long as previous PR as this isn't a required change) in the 2.1 version.

Btw, Version bump is only necessary when we update the changelog will do it next week. Until then I will keep this PR open for review.

[sbrl]

Just got a couple of comments on this - looks like a good update to the spec!

Can't believe that the spec I wrote some time ago is still alive and kicking lol :P

[sbrl]

Changelog will need updating before this is merged.

[kbdharun]

Agreed, will update the changelog and will merge this PR tomorrow (will prepare the release notes too).

[kbdharun]

Done, updated the changelog. Now, I will work on the release notes (which would be pretty small for this release) and then the new release is GTG.

[kbdharun]

Can't believe that the spec I wrote some time ago is still alive and kicking lol :P

Yeah, that's some incredible work you did ❤️ publishing the initial spec and maintaining it throughout time. I am still fascinated by the professional wording and references to RFCs, etc in our client specification.

[sbrl]

Cool!