User guide & vale setup (#2260)

* refactored Storybook UI

* refactored Storybook UI

* removed extra cards from the doc, added card for ui components

* added hover behavior to doc page & made it look selected

* separate storybook docs and tests

* separating storybook tests and docs

* fixed spelling errors in docs

* Final round of edits for frontend, added backend folder architecture

* Created CODE_OF_CONDUCT.md

* Add code of conduct to contributing.md

* doc changes

* fixed broken links

* doc addition and changes

* introduce user guide & graphql api

* set up vale, added to docs

* vale config file

* revised backend best practices

* connecting zapier and twenty

* added warning for zapier

docs/vale/styles/docs/NpmGlobal.yml

@@ -0,0 +1,7 @@
+extends: existence
+message: "The -g option should be added at the end of the command"
+level: error
+scope: raw
+ignorecase: true
+raw:
+  - '(npm (i|install) (-g|--global)|npm (-g|--global) (i|install))'