fbi: add page (#17747)

Co-authored-by: Harshavardhan <harshath3018@gmail.com>

pages/linux/fbi.md

@@ -0,0 +1,24 @@
+# fbi
+
+> Display images in a terminal framebuffer.
+> More information: <https://manned.org/fbi>.
+
+- Display an image:
+
+`sudo fbi {{path/to/file}}`
+
+- Display multiple images:
+
+`sudo fbi {{path/to/file1 path/to/file2 ...}}`
+
+- Start a slideshow with a custom delay (in seconds):
+
+`sudo fbi {{[-t|--timeout]}} {{delay}} {{path/to/files/*}}`
+
+- Scale the image to fit the screen:
+
+`sudo fbi {{[-a|--autozoom]}} {{path/to/file}}`
+
+- Display help:
+
+`fbi {{[-h|--help]}}`