Rename codimd to hedgedoc (#434)

Rename codimd to hedgedoc

src/components/editor/app-bar/help-button/links.tsx

@@ -24,7 +24,7 @@ export const Links: React.FC = () => {
               <TranslatedExternalLink
                 i18nKey='editor.help.contacts.meetUsOn'
                 i18nOption={{ service: 'Matrix' }}
-                href='https://riot.im/app/#/room/#codimd:matrix.org'
+                href='https://riot.im/app/#/room/#hedgedoc:matrix.org'
                 icon='hashtag'
                 className='text-primary'
               />

src/components/editor/app-bar/navbar-branding.tsx

@@ -9,7 +9,7 @@ export const NavbarBranding: React.FC = () => {
     <Navbar.Brand>
       <Link to="/intro" className="text-secondary text-decoration-none d-flex align-items-center">
         <ForkAwesomeIcon icon="file-text" className={'mr-2'}/>
-        <span>CodiMD</span>
+        <span>HedgeDoc</span>
         <Branding inline={true}/>
       </Link>
     </Navbar.Brand>

src/components/editor/editorTestContent.ts

@@ -2,7 +2,7 @@ export const editorTestContent = `---
 title: Features
 description: Many features, such wow!
 robots: noindex
-tags: codimd, demo, react
+tags: hedgedoc, demo, react
 opengraph:
   title: Features
 ---