Imitate "Tutorial - Basics" tutorial page

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Implement https://github.com/ocaml/ocaml.org/blob/master/site/learn/tutorials/basics.md

This issue can benefit from or inform the implementation of #222

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Missing functionality:

• inject ocaml version from process call - manually inject for now
• evaluate ocamltop snippets and inject output - manually inject for now
• syntax highlight for ocaml, console, and c - Implement code highlighting #137 tracking this

Loose ends:

• repair two relative links
• external links should open a new tab - deal with this later, as noted in Generalize markdown driven page component #222

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Start working on front matter parsing noted in #222 and make use of it here.

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evaluate ocamltop snippets and inject output - manually inject for now

Once this has been done, close this issue and create any remaining follow-up tasks

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The main implementation and

inject ocaml version from process call - manually inject for now

were done in #252

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This tutorial has some code blocks that need code highlighting, but do not need to be evaluated by the ocaml compiler. As an example, the tutorial has the following

repeated : string -> int -> string

This is incompatible with ocaml-mdx code block evaluation. The example could be changed to evaluate the symbol repeated, or we could introduce a new annotation for code blocks such as ocaml-highlight-only.

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For simplicity, I suggest we use the approach of rewriting tutorials to always use ocaml snippets that can be evaluated in the ocaml top level.

Also, we need to fix some of the ocaml snippets to rely on a prelude.ml, instead of inlining the necessary definitions.

Once those two items are addressed, we can close this issue.

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The tutorials are moving to ood, so this issue is no longer relevant.