feat: Sets up portal public views with rails ERB and tailwind (#5309)

* feat: Sets up portal public views with rails ERB and tailwind

* linter fixes

* Remove duplicate style file

* Shows articles and categories

* Specify layout for articles page

* Updates public portal styles

* Fixes blog content styles

* Portal style updates for article page

* Review fixes

* Adds breadcrumbs

* fix: rspec

* fix: public portal spec

* Code climate fixes

* Adds test cases for missing files

* Show only published articles

* Updates help center routes

* Review fixes

* Render markdown content for aticle body

* Update app/views/public/api/v1/portals/articles/index.html.erb

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

Co-authored-by: Sojan <sojan@pepalo.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: tejaswini chile <tejaswini@chatwoot.com>

app/javascript/portal/specs/portal.spec.js

@@ -0,0 +1,23 @@
+import { navigateToLocalePage } from '../portalHelpers';
+
+describe('#navigateToLocalePage', () => {
+  it('returns correct cookie name', () => {
+    const elemDiv = document.createElement('div');
+    elemDiv.classList.add('locale-switcher');
+    document.body.appendChild(elemDiv);
+
+    const allLocaleSwitcher = document.querySelector('.locale-switcher');
+
+    allLocaleSwitcher.addEventListener = jest
+      .fn()
+      .mockImplementationOnce((event, callback) => {
+        callback({ target: { value: 1 } });
+      });
+
+    navigateToLocalePage();
+    expect(allLocaleSwitcher.addEventListener).toBeCalledWith(
+      'change',
+      expect.any(Function)
+    );
+  });
+});