Add C++ doc links to `library_design.md` and minor documentation fixes#700

Merged

rapids-bot[bot] merged 3 commits intorapidsai:branch-22.10from isVoid:fix/library_design

Sep 29, 2022

+18-13

Commits on Sep 28, 2022

Commits on Sep 29, 2022

Update docs/source/developer_guide/library_design.md

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