krita: move to common, update description; style-guide: add description guidelines (#10858)

pages/common/krita.md

@@ -0,0 +1,25 @@
+# krita
+
+> A sketching and painting program designed for digital artists.
+> See also: `gimp`.
+> More information: <https://docs.krita.org/en/reference_manual/linux_command_line.html>.
+
+- Start Krita:
+
+`krita`
+
+- Open specific files:
+
+`krita {{path/to/image1 path/to/image2 ...}}`
+
+- Start without a splash screen:
+
+`krita --nosplash`
+
+- Start with a specific workspace:
+
+`krita --workspace {{Animation}}`
+
+- Start in fullscreen mode:
+
+`krita --fullscreen`