add guide for Angular

[Quramy]

Issue:
There is no guide for Angular.

What I did

Write angular-guide.

[hiroppy]

An initial letter should be a lowercase letter;)
see: https://github.com/webpack/media#name

[codecov]

Codecov Report

Merging #2574 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2574   +/-   ##
=======================================
  Coverage   32.68%   32.68%           
=======================================
  Files         398      398           
  Lines        8838     8838           
  Branches      953      954    +1     
=======================================
  Hits         2889     2889           
+ Misses       5313     5282   -31     
- Partials      636      667   +31

Impacted Files	Coverage Δ
app/react/src/server/config/babel.js	0% <0%> (-100%)	⬇️
app/vue/src/server/utils.js	0% <0%> (-53.58%)	⬇️
lib/ui/src/modules/ui/configs/handle_routing.js	24.21% <0%> (ø)	⬆️
lib/components/src/table/table.js	83.33% <0%> (ø)	⬆️
addons/actions/src/lib/util/typeReviver.js	71.42% <0%> (ø)	⬆️
addons/a11y/src/components/Tabs.js	0% <0%> (ø)	⬆️
addons/jest/src/hoc/provideJestResult.js	0% <0%> (ø)	⬆️
addons/info/src/components/markdown/code.js	79.31% <0%> (ø)	⬆️
addons/actions/src/lib/types/nan/index.js	82.35% <0%> (ø)	⬆️
addons/a11y/src/components/WrapStory.js	72.09% <0%> (ø)	⬆️
... and 42 more

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[kazupon]

LGTM 👍
/ping @alterx

[alterx]

LGTM, my only concern is that is dones't touch on any of the specifics but as a quick guide I think it shouldn't

[ndelangen]

Thank you @Quramy !! 🙇