## Summary of the Pull Request
Accumulated information from internal transition about the modules
development, and reworked it to be added in dev docs. Also the dev docs
intself was restructured to be more organized. New pages was
verified by transition team.
## PR Checklist
- [x] **Dev docs:** Added/updated
---------
Co-authored-by: Zhaopeng Wang (from Dev Box) <zhaopengwang@microsoft.com>
Co-authored-by: Hao Liu <liuhao3418@gmail.com>
Co-authored-by: Peiyao Zhao <105847726+zhaopy536@users.noreply.github.com>
Co-authored-by: Mengyuan <162882040+chenmy77@users.noreply.github.com>
Co-authored-by: zhaopeng wang <33367956+wang563681252@users.noreply.github.com>
Co-authored-by: Jaylyn Barbee <51131738+Jaylyn-Barbee@users.noreply.github.com>
* docs: split usage and dev docs
* # This is a combination of 2 commits.
# This is the 1st commit message:
docs: split usage and dev docs
# The commit message #2 will be skipped:
# fixup add docs
* docs: add runner documentation and move hooks documentation to devdocs
* docs: add stubs for modules technical description
* docs: add paragraph about event thread-safety
* docs: add 'Current modules' section header
