[site/theme,#88]: Custom links component with support for video embeds in MDX

[khalilcodes]

Video URL links such as https://www.youtube.com/watch?v=z2uAg-AIs-Y (Youtube, etc) surrounded by newlines in markdown will embed an iframe on the page.
*Similar concept from: https://github.com/agentofuser/remark-oembed

Additional support for links added (since a custom link component is being created):

• next/link for internal links (also checks for links containing a '.md' extension)
• a tags for external links

Notes: moving to contentlayer, md pages now support raw html making the iframe display on page #88 (comment)

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[rufuspollock]

@khalilcodes this looks like it has conflicts. Are you able to resolve and then we merge?

[khalilcodes]

@rufuspollock yes, will update the code.

[rufuspollock]

@khalilcodes is this ready to merge? Also can you point to an example page using it in the preview deploy ...

[khalilcodes]

@rufuspollock I will replace the iframe with the youtube link in one of the 'notes/...' page and commit so it can be previwed.

[khalilcodes]

@rufuspollock a working preview can be seen here - https://deploy-preview-95--boring-fermat-22cb64.netlify.app/notes/are-crypto-tokens-securities ... looks like it's ready to be merged.

[khalilcodes]

@rufuspollock @sdiehl I would suggest we revert the concepts links and the ideologies folder after this merge since the links component has been added in this pr and would resolve # 97. Scratch that, I may need to test this more.

Right now if we merge this the links are broken again as seen in preview.

[sdiehl]

I reverted the last commit that flattened the subdirectory.

[rufuspollock]

@khalilcodes can you summarize where we are at - i also note this PR has got a bit messy including both fixes to titles (?) and youtube change etc.

Can you put in a PR just for the titles fix. Then do a PR just for youtube stuff.

Aside: i think we create a "test.md" where we can put whatever we want to test and not mess with the other pages.

[khalilcodes]

Closing this PR and resubmitting a new one with youtube stuff only.