Use custom api dropdown and fix compatibility for firefox (#39)

- Used custom api dropdown for changing label dynamically. Used method discussed in [this post](https://github.com/facebook/docusaurus/pull/7231). `ComponentTypes` is ejected safely.

  ![Screen Shot 2023-07-05 at 16.21.43](/attachments/b4bc8ae4-6a8a-406c-98b7-f739b13c32ba)

- Fixed dropdowns missing on chrome docs page

  ![Screen Shot 2023-07-05 at 16.44.08](/attachments/1e5315b4-a057-4325-990f-1cbc35fb475f)

-  Fixed `:has` selector compatibility problem on firefox. After (Screenshots from firefox):

  ![Screen Shot 2023-07-05 at 16.10.23](/attachments/76475fb6-fd58-42ec-b4be-6a774553a887)

  ![Screen Shot 2023-07-05 at 16.10.35](/attachments/956f623a-afdb-4ab4-8aa2-beb9420727fb)

  ![Screen Shot 2023-07-05 at 16.15.35](/attachments/af840f31-def4-4f72-8340-f29b72a748bd)

  ![Screen Shot 2023-07-05 at 16.09.30](/attachments/42fa2394-962d-4594-8ef3-c594d3c1e777)

Reviewed-on: https://gitea.com/gitea/gitea-docusaurus/pulls/39
Co-authored-by: HesterG <hestergong@gmail.com>
Co-committed-by: HesterG <hestergong@gmail.com>

src/theme/NavbarItem/ComponentTypes.js

@@ -0,0 +1,24 @@
+import DefaultNavbarItem from '@theme/NavbarItem/DefaultNavbarItem';
+import DropdownNavbarItem from '@theme/NavbarItem/DropdownNavbarItem';
+import LocaleDropdownNavbarItem from '@theme/NavbarItem/LocaleDropdownNavbarItem';
+import SearchNavbarItem from '@theme/NavbarItem/SearchNavbarItem';
+import HtmlNavbarItem from '@theme/NavbarItem/HtmlNavbarItem';
+import DocNavbarItem from '@theme/NavbarItem/DocNavbarItem';
+import DocSidebarNavbarItem from '@theme/NavbarItem/DocSidebarNavbarItem';
+import DocsVersionNavbarItem from '@theme/NavbarItem/DocsVersionNavbarItem';
+import DocsVersionDropdownNavbarItem from '@theme/NavbarItem/DocsVersionDropdownNavbarItem';
+import APIDropDown from '@site/src/components/APIDropDown';
+
+const ComponentTypes = {
+  default: DefaultNavbarItem,
+  localeDropdown: LocaleDropdownNavbarItem,
+  search: SearchNavbarItem,
+  dropdown: DropdownNavbarItem,
+  html: HtmlNavbarItem,
+  doc: DocNavbarItem,
+  docSidebar: DocSidebarNavbarItem,
+  docsVersion: DocsVersionNavbarItem,
+  docsVersionDropdown: DocsVersionDropdownNavbarItem,
+  'custom-apiDropdown': APIDropDown,
+};
+export default ComponentTypes;