picttoppm, pnmtops, ppmtopict, ppmtopuzz, ppmtosixel, psidtopgm, pstopnm, qrttoppm: add pages (#11413)

pages/common/picttoppm.md

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+# picttoppm
+
+> Convert a Macintosh PICT file to a PPM image.
+> More information: <https://netpbm.sourceforge.net/doc/picttoppm.html>.
+
+- Convert a PICT file to a PPM image:
+
+`picttoppm {{path/to/file.pict}} > {{path/to/file.ppm}}`
+
+- Force any images in the PICT file to be output at full resolution:
+
+`picttoppm -fullres {{path/to/file.pict}} > {{path/to/file.ppm}}`
+
+- Do not assume that the input file contains a PICT header and execute quickdraw operations only:
+
+`picttoppm -noheader -quickdraw {{path/to/file.pict}} > {{path/to/file.ppm}}`