Use a formal docusaurus i18n structure

docs/usage/clone-filter.md

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+---
+date: "2021-02-02"
+title: "Clone filters (partial clone)"
+slug: "clone-filters"
+sidebar_position: 25
+draft: false
+toc: false
+aliases:
+  - /en-us/clone-filters
+menu:
+  sidebar:
+    parent: "usage"
+    name: "Clone filters"
+    sidebar_position: 25
+    identifier: "clone-filters"
+---
+
+# Clone filters (partial clone)
+
+Git introduces `--filter` option to `git clone` command, which filters out
+large files and objects (such as blobs) to create partial clone of a repo.
+Clone filters are especially useful for large repo and/or metered connection,
+where full clone (without `--filter`) can be expensive (as all history data
+must be downloaded).
+
+This requires Git version 2.22 or later, both on the Gitea server and on the
+client. For clone filters to work properly, make sure that Git version
+on the client is at least the same as on the server (or later). Login to
+Gitea server as admin and head to Site Administration -> Configuration to
+see Git version of the server.
+
+By default, clone filters are enabled, unless `DISABLE_PARTIAL_CLONE` under
+`[git]` is set to `true`.
+
+See [GitHub blog post: Get up to speed with partial clone](https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/)
+for common use cases of clone filters (blobless and treeless clones), and
+[GitLab docs for partial clone](https://docs.gitlab.com/ee/topics/git/partial_clone.html)
+for more advanced use cases (such as filter by file size and remove
+filters to turn partial clone into full clone).