[Chapel Merge] Add Mason Packages placeholder to documentation

Branch: refs/heads/master
Revision: a78b3e9
Author: ben-albrecht
Log Message:

Merge pull request #17000 from ben-albrecht/mason-registry-doc

Add Mason Packages placeholder to documentation

This PR adds a short top-level documentation page under the module docs in “Writing Chapel Programs” for advertising and explaining the processes around mason packages.

Resolves Add "community mason package" placeholder page to docs hierarchy · Issue #16913 · chapel-lang/chapel · GitHub

[Reviewed by @bradcray]

Modified Files:
A doc/rst/mason-packages.rst
M doc/rst/index.rst
M doc/rst/tools/mason/mason.rst

Compare: Comparing 013349be7e5b...a78b3e9c5c2e · chapel-lang/chapel · GitHub