feat: move theme selector into avatar menu and refacto theme selector component

src/app/app.module.ts

...ponents/presentationals/avatar/avatar.presentational.html

...omponents/presentationals/avatar/avatar.presentational.ts

...ontal/main-toolbar-desktop-horizontal.presentational.html

...ontal/main-toolbar-desktop-horizontal.presentational.scss

...eme-selector-menu/theme-selector-menu.presentational.html

...eme-selector-menu/theme-selector-menu.presentational.scss

...-selector-menu/theme-selector-menu.presentational.spec.ts

...theme-selector-menu/theme-selector-menu.presentational.ts

...tionals/theme-selector/theme-selector.presentational.html

...tionals/theme-selector/theme-selector.presentational.scss

...tationals/theme-selector/theme-selector.presentational.ts

src/app/shared/enums/icon-name.enum.ts

src/app/shared/helpers/icon.helper.ts

src/assets/i18n/de.json

src/assets/i18n/en.json

src/assets/i18n/fr.json