feat(table-of-contents): cached data

[Alexnortung]

This pull request is a draft as I would like some feedback for the direction.

I think it would be beneficial to be able to provide cached data for the table of contents, just like other fields.

Does the ToCEntry type make sense, should it be defined elsewhere? Or should it be something else entirely?

Does other properties also influence the output?

TODO:

• Find the correct value for space left of each level
• Find the correct value for the page width
• Clean up
• Add tests
• Documentation

[Alexnortung]

For some reason, the level margin doesn't work as expected, not sure why

[Alexnortung]

I am not sure why test is failing. I am pretty sure I am covering all code paths in the code that I have added.

Also what is wrong with the CSpell?

[dolanmiu]

Can you give me write permissions for this repo so I can fix the cspell, test and resolve conflicts?

[Alexnortung]

I have tried to invite you, let me know if it worked

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (6de8a8f) to head (d19a6b7).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #3319   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          305       305           
  Lines         9435      9510   +75     
  Branches      1499      1517   +18     
=========================================
+ Hits          9435      9510   +75     

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[dolanmiu]

I have tried to invite you, let me know if it worked

All worked, thanks! Updated branch. Looks good. I will update the name of it. cachedContent (in a TableOfContents) is a bit verbose, maybe just cache @Alexnortung

[Alexnortung]

regarding cachedContent I was trying to be consistent in regards to SimpleField which defines cachedValue.

I have renamed it to cachedEntries to allow for other elements such as a cached title.