icontopbm, pbmtoicon, pbmtosunicon, sunicontopbm: add pages (#12408)

pages/common/icontopbm.md

@@ -0,0 +1,8 @@
+# icontopbm
+
+> This command is superseded by `sunicontopbm`.
+> More information: <https://netpbm.sourceforge.net/doc/icontopbm.html>.
+
+- View documentation for the current command:
+
+`tldr sunicontopbm`

pages/common/pbmtoicon.md

@@ -0,0 +1,8 @@
+# pbmtoicon
+
+> This command is superseded by `pbmtosunicon`.
+> More information: <https://netpbm.sourceforge.net/doc/pbmtoicon.html>.
+
+- View documentation for the current command:
+
+`tldr pbmtosunicon`

pages/common/pbmtosunicon.md

@@ -0,0 +1,8 @@
+# pbmtosunicon
+
+> Convert a PBM image into a Sun icon.
+> More information: <https://netpbm.sourceforge.net/doc/pbmtosunicon.html>.
+
+- Convert a PBM image into a Sun icon:
+
+`pbmtosunicon {{path/to/input.pbm}} > {{path/to/output.ico}}`

pages/common/sunicontopbm.md

@@ -0,0 +1,8 @@
+# sunicontopnm
+
+> Convert a Sun icon into a Netpbm image.
+> More information: <https://netpbm.sourceforge.net/doc/sunicontopnm.html>.
+
+- Convert a Sun icon into a Netpbm image:
+
+`sunicontopnm {{path/to/input.ico}} > {{path/to/output.pbm}}`