fix(docs): repoint example-app paths after the examples/basics move

[Angiephoenix]

The example apps moved from examples/basics/ to example-apps/, but the docs
still point at the old layout.

Ten example READMEs plus laravel's IMPLEMENTATION.md print basics/<name>/ in
their structure blocks, and expo's quick start says cd basics/expo, which
fails. These aren't just local docs. example-processor.js reads every file in an
example directory, README first, and that markdown ships inside the skill
bundles. .md isn't in skip-patterns.yaml, so
grep -rn "basics/" --include="*.md" dist returned hits across
dist/marketplace/plugins/... before this change. After it, nothing.

The root README tree was out of date in three ways: examples/ doesn't exist,
the basics/ level doesn't exist, and it listed 7 examples where there are now
35.

One extra: javascript-web's README pointed at basics/javascript/. The
directory is javascript-web, so the name needed updating along with the
parent.

Two things I'm less sure about. I left mcp-commands/ out of the tree because I
couldn't find that directory anywhere in the repo. I also left out scripts/,
since it sits at the repo root rather than inside the examples. Happy to add
either back.