airshare: add page (#10282)

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/airshare.md

@@ -0,0 +1,28 @@
+# airshare
+
+> Transfer data between two machines in a local network.
+> More information: <https://airshare.rtfd.io/en/latest/cli.html>.
+
+- Share files or directories:
+
+`airshare {{code}} {{path/to/file_or_directory1 path/to/file_or_directory2 ...}}`
+
+- Receive a file:
+
+`airshare {{code}}`
+
+- Host a receiving server (use this to be able to upload files using the web interface):
+
+`airshare --upload {{code}}`
+
+- Send files or directories to a receiving server:
+
+`airshare --upload {{code}} {{path/to/file_or_directory1 path/to/file_or_directory2 ...}}`
+
+- Send files whose paths have been copied to the clipboard:
+
+`airshare --file-path {{code}}`
+
+- Receive a file and copy it to the clipboard:
+
+`airshare --clip-receive {{code}}`