docs: use doxygen directly and drop breathe

[ReenigneArcher]

Description

Breathe does no support Objective-C and I am tired of fighting it. This PR will use Doxygen for source code documentation instead of Breathe. While it may not be as pretty, it will be sufficient.

Also, Windows builds will revert to installed boost instead of fetched to improve build times. The codeql build was especially slow.

Screenshot

Issues Fixed or Closed

• Closes docs: use doxygenindex directive for src #2726

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

LizardByte requires that branches be up-to-date before merging. This means that after any PR is merged, this branch
must be updated before it can be merged. You must also
Allow edits from maintainers.

• I want maintainers to keep my branch updated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 8.96%. Comparing base (13f94f1) to head (e56a7c9).
Report is 1 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #2739   +/-   ##
======================================
  Coverage    8.96%   8.96%           
======================================
  Files          94      94           
  Lines       17392   17392           
  Branches     8270    8270           
======================================
  Hits         1560    1560           
- Misses      12963   12967    +4     
+ Partials     2869    2865    -4     

Flag	Coverage Δ
Linux	6.79% <ø> (ø)
Windows	4.16% <ø> (ø)
macOS-12	10.04% <ø> (-0.02%)	⬇️
macOS-13	9.95% <ø> (ø)
macOS-14	10.24% <ø> (ø)

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see 3 files with indirect coverage changes