Refactor UI folder (#2016)

* Added Overview page

* Revised Getting Started page

* Minor revision

* Edited readme, minor modifications to docs

* Removed sweep.yaml, .devcontainer, .ergomake

* Moved security.md to .github, added contributing.md

* changes as per code review

* updated contributing.md

* fixed broken links & added missing links in doc, improved structure

* fixed link in wsl setup

* fixed server link, added https cloning in yarn-setup

* removed package-lock.json

* added doc card, admonitions

* removed underline from nav buttons

* refactoring modules/ui

* refactoring modules/ui

* Change folder case

* Fix theme location

* Fix case 2

* Fix storybook

---------

Co-authored-by: Nimra Ahmed <nimra1408@gmail.com>
Co-authored-by: Nimra Ahmed <50912134+nimraahmed@users.noreply.github.com>

docs/src/css/custom.css

@@ -234,4 +234,8 @@ a.table-of-contents__link:hover{
 
 .tabs-container {
   padding: 20px;
+}
+
+.card{
+  text-decoration: none;
 }