Add Send & ffsend to File Sharing page (#1837)

Signed-off-by: Daniel Gray <dng@disroot.org>

docs/assets/img/file-sharing-sync/send.svg

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="64mm" height="64mm" version="1.1" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg"><path id="cloud-upload" d="m64 34.286a17.033 17.033 0 0 1-4.4062 11.429 14.857 14.857 0 0 1-10.558 4.5714h-2.1786v-6.8571h2.1786a8.0044 8.0044 0 0 0 5.4688-2.3103 10.184 10.184 0 0 0 2.6384-6.8326 11.442 11.442 0 0 0-11.429-11.429c-0.37683 0-2.3126 0.2418-3.4903 0.3935a1.136 1.136 0 0 1-1.2211-0.76359l-0.46538-1.3576a14.103 14.103 0 0 0-11.716-9.6317 13.666 13.666 0 0 0-14.73 16.779l0.4881 2.0877a1.1429 1.1429 0 0 1-0.78226 1.3542l-2.054 0.62062a6.7941 6.7941 0 0 0-4.8861 6.5178 4.6044 4.6044 0 0 0 0.94642 2.808 5.5388 5.5388 0 0 0 4.0893 1.7634h5.25v6.8571h-5.25a12.236 12.236 0 0 1-9.6808-4.6518 11.506 11.506 0 0 1-2.212-6.7768 13.573 13.573 0 0 1 6.9442-11.884c-0.057884-0.6138-0.087074-1.2254-0.087074-1.8304a20.563 20.563 0 0 1 38.987-9.1428 18.307 18.307 0 0 1 18.156 18.286zm-31.077-2.1632a1.1429 1.1429 0 0 0-1.8465 0l-8.5917 11.775a1.1429 1.1429 0 0 0 0.92327 1.8165h5.1631v12.571a1.1429 1.1429 0 0 0 1.1428 1.1429h4.5714a1.1429 1.1429 0 0 0 1.1429-1.1429v-12.571h5.1631a1.1429 1.1429 0 0 0 0.92326-1.8165z" fill="#45a1ff" stroke-width="2.2857"/></svg>

docs/file-sharing.en.md

@@ -6,6 +6,26 @@ Discover how to privately share your files between your devices, with your frien
 
 ## File Sharing
 
+### Send
+
+!!! recommendation
+
+    ![Send logo](assets/img/file-sharing-sync/send.svg){ align=right }
+
+    **Send** is a fork of Mozilla’s discontinued Firefox Send service which allows you to send files to others with a link. Files are encrypted on your device so that they cannot be read by the server, and they can be optionally password-protected as well. The maintainer of Send hosts a [public instance](https://send.vis.ee/). You can use other public instances, or you can host Send yourself.
+
+    [:octicons-home-16: Homepage](https://send.vis.ee){ .md-button .md-button--primary }
+    [:octicons-server-16:](https://github.com/timvisee/send-instances){ .card-link title="Public Instances"}
+    [:octicons-info-16:](https://github.com/timvisee/send#readme){ .card-link title=Documentation}
+    [:octicons-code-16:](https://github.com/timvisee/send){ .card-link title="Source Code" }
+    [:octicons-heart-16:](https://github.com/sponsors/timvisee){ .card-link title=Contribute }
+
+Send can be used via its web interface or via the [ffsend](https://github.com/timvisee/ffsend) CLI. If you are familiar with the command-line and send files frequently, we recommend using the CLI client to avoid JavaScript-based encryption. You can specify the `--host` flag to use a specific server:
+
+```bash
+ffsend upload --host https://send.vis.ee/ FILE
+```
+
 ### OnionShare
 
 !!! recommendation
@@ -16,7 +36,7 @@ Discover how to privately share your files between your devices, with your frien
 
     [:octicons-home-16: Homepage](https://onionshare.org){ .md-button .md-button--primary }
     [:simple-torbrowser:](http://lldan5gahapx5k7iafb3s4ikijc4ni7gx5iywdflkba5y2ezyg6sjgyd.onion){ .card-link title="Onion Service" }
-    [:octicons-info-16:](https://docs.onionshare.org/){ .card-link title=Documentation}
+    [:octicons-info-16:](https://docs.onionshare.org){ .card-link title=Documentation}
     [:octicons-code-16:](https://github.com/onionshare/onionshare){ .card-link title="Source Code" }
 
     ??? downloads

docs/tools.en.md

@@ -322,6 +322,7 @@ We [recommend](dns.md#recommended-providers) a number of encrypted DNS servers b
 
 <div class="grid cards" markdown>
 
+- ![Send logo](assets/img/file-sharing-sync/send.svg){ .twemoji } [Send](file-sharing.md#send)
 - ![OnionShare logo](assets/img/file-sharing-sync/onionshare.svg){ .twemoji } [OnionShare](file-sharing.md#onionshare)
 - ![FreedomBox logo](assets/img/file-sharing-sync/freedombox.svg){ .twemoji } [FreedomBox](file-sharing.md#freedombox)
 - ![Syncthing logo](assets/img/file-sharing-sync/syncthing.svg){ .twemoji } [Syncthing](file-sharing.md#syncthing)