[MBL-943] Add Additional Header Support to HTML Parser

[msadoon]

📲 What

There's been a change on the web to support a new parser called CKEditor and it supports additional header tags. Previously we supported only h1. Now we support h1, h2, h3, h4, h5, h6.

🤔 Why

As stated above, we would eventually need to add new elements/HTML tags supported by more modern project creation tools.

🛠 How

Pretty straightforward, taking a look at the Android pull request that does the exact same thing. Used the font sizes for reference so they should be the same size on both platforms.

Might be nice to screenshot test all the supported HTML components one day...thinking when we remove the parser and get good support for story properties on the ProjectFragment we can look into this.

👀 See

Before 🐛	After 🦋

Before 🐛	After 🦋

✅ Acceptance criteria

• Ensure h1 headers are larger size after the change. Before this change they were size 20, now they are 28. Ie. WakeFX Rope-Pal - Automated Waksurf Rope System on staging. (screens above).
• Ensure new headers are supported via sample staging project "CKE Test project for Mobile". Note: Before adding this support h3 and h4 would not show. HTML snippet from sample project: <h3 id=\"h:Header\" class=\"page-anchor\">Header</h3><h4 id=\"h:Subheader\" class=\"page-anchor\">Subheader</h4>, but now they do. (screens above)

⏰ TODO

• Update tests.

[codecov]

Codecov Report

Merging #1844 (55d2d28) into main (baffd7c) will increase coverage by 0.01%.
The diff coverage is 94.82%.

@@            Coverage Diff             @@
##             main    #1844      +/-   ##
==========================================
+ Coverage   84.52%   84.53%   +0.01%     
==========================================
  Files        1272     1272              
  Lines      115287   115364      +77     
  Branches    30693    30710      +17     
==========================================
+ Hits        97451    97528      +77     
  Misses      16767    16767              
  Partials     1069     1069              

Files Changed	Coverage Δ
KsApi/lib/HTML Parser/HTMLParserTests.swift	70.79% <75.00%> (+1.35%)	⬆️
...ib/HTML Parser/Templates/HTMLParserTemplates.swift	98.36% <100.00%> (+0.38%)	⬆️
...ib/HTML Parser/View Elements/ViewElementType.swift	95.65% <100.00%> (+1.20%)	⬆️
...els/HTML Parser/TextViewElementCellViewModel.swift	93.40% <100.00%> (+1.62%)	⬆️
...TML Parser/TextViewElementCellViewModelTests.swift	100.00% <100.00%> (ø)

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[scottkicks]

LGTM other than I see that the headers, World's First Automated Wakesurf Rope System and 100% Automatic to the Surfer and Back to Start are indented unlike the other headers below them.

Could that be an issue with our parser or is that just how the html is initially for this project?

Thanks for linking the android PR. Its good to see that we're maintaining feature parody on with this.

[msadoon]

Not sure what - if any - changes are required here.

[scottkicks]

@msadoon meant that to be an approval, not a comment. my bad 😅