ppmtopjxl, ppmwheel, ppmtoapplevol: add pages (#15355)

* fix ci

* ppmtopjxl, ppmwheel, ppmtoapplevol: add pages

pages/common/ppmtopjxl.md

@@ -0,0 +1,20 @@
+# ppmtopjxl
+
+> Convert a PPM image into an HP PaintJet XL PCL file.
+> More information: <https://netpbm.sourceforge.net/doc/ppmtopjxl.html>.
+
+- Convert a PPM image into an PJXL file:
+
+`ppmtopjxl {{path/to/image.ppm}} > {{path/to/output.pjxl}}`
+
+- Resize the input image:
+
+`ppmtopjxl -xsize {{10cm}} -ysize {{5cm}} {{path/to/image.ppm}} > {{path/to/output.pjxl}}`
+
+- Shift the input image:
+
+`ppmtopjxl -xshift {{10pt}} -yshift {{5pt}} {{path/to/image.ppm}} > {{path/to/output.pjxl}}`
+
+- Do not use the normal TIFF 4.0 compression method:
+
+`ppmtopjxl -nopack {{path/to/image.ppm}} > {{path/to/output.pjxl}}`