## Summary
Move Command Palette developer documentation from
\src/modules/cmdpal/doc\ to \doc/devdocs/modules/cmdpal\, consistent
with the location of other module dev docs.
Also updates the spell-check exclude path for the moved \.pdn\ file.
Points 2 and 3 from the issue (extension settings how-to and details
pane markdown documentation) are addressed in the windows-dev-docs-pr
repo.
Closes#38107
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
