rpicam-{hello,jpeg,raw,still,vid}: add page (#12078)

* rpicam-{hello,jpeg,raw,still,vid}: add page

---------

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/linux/rpicam-raw.md

@@ -0,0 +1,12 @@
+# rpicam-raw
+
+> Capture a raw video on a Raspberry Pi camera.
+> More information: <https://www.raspberrypi.com/documentation/computers/camera_software.html#rpicam-raw>.
+
+- Capture a video for a specific amount of seconds:
+
+`rpicam-raw -t {{2000}}} -o {{path/to/file.raw}}`
+
+- Change video dimensions and framerate:
+
+`rpicam-raw -t {{5000}} --width {{4056}} --height {{3040}} -o {{path/to/file.raw}} --framerate {{8}}`