📚Switch to using DocumenterInterLinks for ManifoldsBase.jl

[kellertuer]

This is still a bit WIP, since we have to

• [x] check all occurrences of .io/ManifoldsBase.jl/ in the docs and check whether to replace that with an interlink (probably in all cases besides the Readme.md
• [x] figure out how to handle that in the .qmd files

But in general it seems to work really nice and smoothly, following the ideas mentioned at http://juliadocs.org/DocumenterInterLinks.jl/stable/syntax/

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.73%. Comparing base (a0cb692) to head (39f7921).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #366 +/- ## ======================================= Coverage 99.73% 99.73% ======================================= Files 73 73 Lines 6822 6822 ======================================= Hits 6804 6804 Misses 18 18 ```

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[kellertuer]

This should be finished so far. I think since this is just a technical update, it should maybe not get its own release but be part of the next one.

[mateuszbaran]

LGTM.

Do you prefer do merge this one first or the sectional curvature one?

[kellertuer]

Yes, I think merging this one first has two advantages

• you can use the same new scheme directly to link to the sectional curvature as well
• merging this into your PR hopefully also fixes the documentation run there.