Remove all empty "Under Construction" placeholder pages for server/
and client/ directories. Only pages with actual content should exist.
- Remove docs/server/ and docs/client/ placeholder pages
- Strip mkdocs.yml nav to only pages with real content
- Remove broken links from concepts.md and quickstart.md (replaced
with TODO comments for when those pages are created)
- Simplify index.md by removing card grid linking to non-existent pages
Marcelo Trylesinski
f4e091890d