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

* fix ci

* ppmtopjxl, ppmwheel, ppmtoapplevol: add pages

pages/common/ppmtoapplevol.md

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+# ppmtoapplevol
+
+> Convert a PPM image into an Apple volume label image.
+> More information: <https://netpbm.sourceforge.net/doc/ppmtoapplevol.html>.
+
+- Convert a PPM image into an Apple volume label image:
+
+`ppmtoapplevol {{path/to/image.ppm}} > {{path/to/output}}`

pages/common/ppmtopjxl.md

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+# 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}}`

pages/common/ppmwheel.md

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+# ppmwheel
+
+> Generate a PPM image of a color wheel.
+> More information: <https://netpbm.sourceforge.net/doc/ppmwheel.html>.
+
+- Generate a color wheel of type `Ppmcirc`:
+
+`ppmwheel {{diameter}} > {{path/to/output.ppm}}`
+
+- Generate a color wheel of type `Hue-value`:
+
+`ppmwheel -huevalue {{diameter}} > {{path/to/output.ppm}}`
+
+- Generate a color wheel of type `Hue-saturation`:
+
+`ppmwheel -huesaturation {{diameter}} > {{path/to/output.ppm}}`