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-jpeg.md

@@ -0,0 +1,16 @@
+# rpicam-jpeg
+
+> Capture and store a JPEG image using a Raspberry Pi camera.
+> More information: <https://www.raspberrypi.com/documentation/computers/camera_software.html#rpicam-jpeg>.
+
+- Capture an image and name the file:
+
+`rpicam-jpeg -o {{path/to/file.jpg}}`
+
+- Capture an image with set dimensions:
+
+`rpicam-jpeg -o {{path/to/file.jpg}} --width {{1920}} --height {{1080}}`
+
+- Capture an image with an exposure of 20 seconds and a gain of 150%:
+
+`rpicam-jpeg -o {{path/to/file.jpg}} --shutter 20000 --gain 1.5`