Moved playgrounds to pages and checked App Extension API only setting

[jay18001]

Closes #146 and #147

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@5aad063). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #148   +/-   ##
=========================================
  Coverage          ?   93.42%           
=========================================
  Files             ?       39           
  Lines             ?     3148           
  Branches          ?        0           
=========================================
  Hits              ?     2941           
  Misses            ?      207           
  Partials          ?        0

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5aad063...a665ff0. Read the comment docs.