eyuvtoppm, ppmtoeyuv, ppmtoyuv, ppmtoyufsplitm, yuvsplittoppm, yuvtoppm: add pages (#11380)

pages/common/eyuvtoppm.md

@@ -0,0 +1,8 @@
+# eyuvtoppm
+
+> Convert a Berkeley YUV file to PPM.
+> More information: <https://netpbm.sourceforge.net/doc/eyuvtoppm.html>.
+
+- Read a Berkeley YUV file from the specified input file, convert it to a PPM image and store it in the specified output file:
+
+`eyuvtoppm --width {{width}} --height {{height}} {{path/to/input_file.eyuv}} > {{path/to/output_file.ppm}}`