Readme links ToC PyPI and other minor fixes

[galabovaa]

• Links of ToC in README
  • Resolves Fix links of README for https://pypi.org/project/highspy/ #2744
• Update of README and docs for precompiled binaries
• Update docs for BUILD_OPENBLAS
• HiPO Fetch OpenBLAS fixes debug and MSVC build

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.32%. Comparing base (574f304) to head (a058a69).
⚠️ Report is 223 commits behind head on latest.

Additional details and impacted files

@@            Coverage Diff             @@
##           latest    #2758      +/-   ##
==========================================
- Coverage   81.32%   80.32%   -1.01%     
==========================================
  Files         349      348       -1     
  Lines       86132    86073      -59     
==========================================
- Hits        70051    69141     -910     
- Misses      16081    16932     +851     

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[jajhall]

The documentation changes look good to me

As usual, I have to trust you on the build changes!