Update Docs to use new Notes form and use yarn for addon install

[paul42]

Issue: #3305

What I did

Updated documents

How to test

View help documents and verify they look acceptable

Is this testable with Jest or Chromatic screenshots?
no?

Does this need a new example in the kitchen sink apps?
no

Does this need an update to the documentation?
N/A, this is a documentation update

If your answer is yes to any of these, please make sure to include it in your PR.

[codecov]

Codecov Report

Merging #3309 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3309   +/-   ##
=======================================
  Coverage   35.63%   35.63%           
=======================================
  Files         472      472           
  Lines       10121    10121           
  Branches      947      964   +17     
=======================================
  Hits         3607     3607           
+ Misses       5949     5889   -60     
- Partials      565      625   +60

Impacted Files	Coverage Δ
addons/actions/src/lib/decycle.js	53.52% <0%> (ø)	⬆️
...t-native/src/preview/components/StoryView/index.js	0% <0%> (ø)	⬆️
addons/info/src/components/types/Shape.js	66.03% <0%> (ø)	⬆️
lib/core/src/client/preview/reducer.js	37.5% <0%> (ø)	⬆️
.../ui/src/modules/ui/components/layout/dimensions.js	15.62% <0%> (ø)	⬆️
addons/storysource/src/loader/inject-decorator.js	28% <0%> (ø)	⬆️
...modules/ui/components/stories_panel/text_filter.js	30.98% <0%> (ø)	⬆️
lib/ui/src/modules/ui/configs/init_panels.js	25% <0%> (ø)	⬆️
addons/knobs/src/mithril/WrapStory.js	0% <0%> (ø)	⬆️
...react-native/src/manager/components/PreviewHelp.js	0% <0%> (ø)	⬆️
... and 62 more

---

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 1daab23...77801ae. Read the comment docs.

[paul42]

thanks @Hypnosphi I appreciate the help!