Documentation modification for the repo size limit feature

Signed-off-by: DmitryFrolovTri <23313323+DmitryFrolovTri@users.noreply.github.com>

docs/content/doc/administration/repo-size-limit.en-us.md

@@ -0,0 +1,54 @@
+---
+date: "2023-05-24T13:00:00+00:00"
+title: "Per repository size limit"
+slug: "repo-size-limit"
+weight: 12
+toc: false
+draft: false
+aliases:
+  - /en-us/repo-size-limit
+menu:
+  sidebar:
+    parent: "administration"
+    name: "Per repository size limit"
+    weight: 12
+    identifier: "repo-size-limit"
+---
+
+# Gitea per repository size limit setup
+
+To use Gitea's experimental built-in per repository size limit support, Administrator must update the `app.ini` file:
+
+```ini
+;; Enable applying a global size limit defined by REPO_SIZE_LIMIT. Each repository can have a value that overrides the global limit
+;; "false" means no limit will be enforced, even if specified on a repository
+ENABLE_SIZE_LIMIT = true
+
+;; Specify a global repository size limit in bytes to apply for each repository. 0 - No limit
+;; If repository has it's own limit set in UI it will override the global setting
+;; Standard units of measurements for size can be used like B, KB, KiB, ... , EB, EiB, ...
+REPO_SIZE_LIMIT = 500 MB
+```
+This setting is persistent.
+
+
+The size limitation is triggered when repository `disk size` + `new commit size` > `defined repository size limit`
+
+If size limitation is triggered the feature would prevent commits that increase repository size on disk
+of gitea server and allow those that decrease it
+
+
+# Gitea per repository size limit setup in UI
+
+1. For Gitea admin it is possible during runtime to enable/disable limit size feature, change the global size limit on the fly.
+**This setting is not persistent across restarts**
+
+`Admin panel/Site settings` -> `Repository management`
+
+Persistance can be achieved if the limit is maintained by editing `app.ini` file
+
+2. The individually set per repository limit in `Settings` of the
+repository would take precedence over global limit when the size limit
+feature is enabled. Only admin can modify those limits
+
+**Note**: Size checking for large repositories is time consuming operation so time of push under size limit might increase up to a minute depending on your server hardware

docs/content/page/index.en-us.md

@@ -112,6 +112,7 @@ You can try it out using [the online demo](https://try.gitea.io/).
       - Hooks
     - Repository management
       - See all repository information and manage repositories
+      - Set per repository global size limit, disable/enable the repository limit (runtime only), permanent should be done via Configuration file
     - Authentication sources
       - OAuth
       - PAM
@@ -170,6 +171,7 @@ You can try it out using [the online demo](https://try.gitea.io/).
   - Git LFS
   - Watch, Star, Fork
   - View watchers, stars, and forks
+  - Size limit (excl. LFS)
   - Code
     - Branch browser
     - Web based file upload and creation