doc: added documentation for internalized libraries, documented roadmap

[fredbi]

Change type

Please select: 🆕 New feature or enhancement|🔧 Bug fix'|📃 Documentation update

Short description

Fixes

Full description

Checklist

• I have signed all my commits with my name and email (see DCO. This does not require a PGP-signed commit
• I have rebased and squashed my work, so only one commit remains
• I have added tests to cover my changes.
• I have properly enriched go doc comments in code.
• I have properly documented any breaking change.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.31%. Comparing base (662ad08) to head (76ec4a4).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master       #4   +/-   ##
=======================================
  Coverage   54.31%   54.31%           
=======================================
  Files          18       18           
  Lines        4864     4864           
=======================================
  Hits         2642     2642           
  Misses       2159     2159           
  Partials       63       63           

Flag	Coverage Δ
oldstable-macos-latest	54.31% <ø> (ø)
oldstable-ubuntu-latest	54.31% <ø> (ø)
oldstable-windows-latest	54.31% <ø> (ø)
stable-macos-latest	54.31% <ø> (ø)
stable-ubuntu-latest	54.31% <ø> (ø)
stable-windows-latest	54.31% <ø> (ø)

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