pamoil, pgmbentley, pgmdeshadow, pgmoil, ppmrainbow, ppmrelief, ppmshadow, ppmshift, ppmspread, ppmtoacad, ppmtobmp, ppmtoicr: add pages (#11433)

pages/common/ppmtobmp.md

@@ -0,0 +1,16 @@
+# ppmtobmp
+
+> Convert a PPM image to a BMP file.
+> More information: <https://netpbm.sourceforge.net/doc/ppmtobmp.html>.
+
+- Convert a PPM image to a BMP file:
+
+`ppmtobmp {{path/to/file.ppm}} > {{path/to/file.bmp}}`
+
+- Explicitly specify whether or not a Windows BMP file or an OS/2 BMP file should be created:
+
+`ppmtobmp -{{windows|os2}} {{path/to/file.ppm}} > {{path/to/file.bmp}}`
+
+- Specify the number of bits to use for each pixel:
+
+`ppmtobmp -bbp {{1|4|8|24}} {{path/to/file.ppm}} > {{path/to/file.bmp}}`