pamtoqoi, pbmtozinc, ppmtoarbtxt, qoitopam, rawtopgm, rawtoppm: add pages (#11401)

pages/common/ppmtoarbtxt.md

@@ -0,0 +1,20 @@
+# ppmtoarbtxt
+
+> Convert a PPM image to an arbitrary text format according to a template.
+> More information: <https://netpbm.sourceforge.net/doc/ppmtoarbtxt.html>.
+
+- Convert a PPM image to text as specified by the given template:
+
+`ppmtoarbtxt {{path/to/template}} {{path/to/image.ppm}} > {{path/to/output_file.txt}}`
+
+- Convert a PPM image to text as specified by the given template, prepend the contents of the specified head template:
+
+`ppmtoarbtxt {{path/to/template}} -hd {{path/to/head_template}} {{path/to/image.ppm}} > {{path/to/output_file.txt}}`
+
+- Convert a PPM image to text as specified by the given template, append the contents of the specified tail template:
+
+`ppmtoarbtxt {{path/to/template}} -hd {{path/to/tail_template}} {{path/to/image.ppm}} > {{path/to/output_file.txt}}`
+
+- Display version:
+
+`ppmtoarbtxt -version`