feat: add cross-linking with to tblkch whitepaper

[fakela]

Closes #559

[github-actions]

No documentation issues detected.

[github-actions]

No documentation issues detected.

[fakela]

Category: Should we simplify the sentence so the links sit on the naturally related word (i underlined the word). This would mean that we might have to rewrite the sentence sligtly in some cases

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[fakela]

Category: I used chapter number reference cause they were too long(below is how long the descriptive links were)

[github-actions]

Thanks for the update on foundations/whitepapers/tblkch.mdx: there is one inline suggestion to keep the document consistent with the style guide, so please apply the inline suggestion.

[fakela]

@verytactical I have clarified this new approach with Alexy, as I had some questions around it (based on the screenshots I shared above). I'll adjust the sentences especially those with described in, explained in, etc and place the links on the natural occuring text.