feat: adds blog archive route (#5428)

* [feature] adds blog archive route

* Update plugin-content-blog.md

* fix TS issues + minor refactors

* remove useless css

* add translation apis

* add missing translations

Co-authored-by: slorber <lorber.sebastien@gmail.com>

packages/docusaurus-plugin-content-blog/src/index.ts

@@ -225,6 +225,8 @@ export default function pluginContentBlog(
         blogPostComponent,
         blogTagsListComponent,
         blogTagsPostsComponent,
+        routeBasePath,
+        archiveBasePath,
       } = options;
 
       const {addRoute, createData} = actions;
@@ -243,6 +245,26 @@ export default function pluginContentBlog(
           ? blogPosts
           : take(blogPosts, options.blogSidebarCount);
 
+      const archiveUrl = normalizeUrl([
+        baseUrl,
+        routeBasePath,
+        archiveBasePath,
+      ]);
+
+      // creates a blog archive route
+      const archiveProp = await createData(
+        `${docuHash(archiveUrl)}.json`,
+        JSON.stringify({blogPosts}, null, 2),
+      );
+      addRoute({
+        path: archiveUrl,
+        component: '@theme/BlogArchivePage',
+        exact: true,
+        modules: {
+          archive: aliasedSource(archiveProp),
+        },
+      });
+
       // This prop is useful to provide the blog list sidebar
       const sidebarProp = await createData(
         // Note that this created data path must be in sync with