isisdl: add page (#8134)

pages/common/isisdl.md

@@ -0,0 +1,28 @@
+# isisdl
+
+> A downloading utility for ISIS of TU-Berlin. Download all your files and videos from ISIS.
+> More information: <https://github.com/Emily3403/isisdl>.
+
+- Start the synchronization process:
+
+`isisdl`
+
+- Limit the download rate to 20 MiB/s and download with 5 threads:
+
+`isisdl --download-rate {{20}} --max-num-threads {{5}}`
+
+- Run the initialization configuration wizard:
+
+`isisdl --init`
+
+- Run the additional configuration wizard:
+
+`isisdl --config`
+
+- Initiate a full synchronization of the database and compute the checksum of every file:
+
+`isisdl --sync`
+
+- Start ffmpeg to compress downloaded videos:
+
+`isisdl --compress`