Utilities: Rename `jp` to `json`

With the scope of `jp` expanding beyond just printing JSON (e.g.
querying JSON), `json` seems to be a more fitting name.

Userland/Utilities/CMakeLists.txt

@@ -135,9 +135,9 @@ target_link_libraries(id LibMain)
 target_link_libraries(ifconfig LibMain)
 target_link_libraries(ini LibMain)
 target_link_libraries(install-bin LibMain)
-target_link_libraries(jp LibMain)
 target_link_libraries(js LibJS LibLine LibMain LibTextCodec)
 link_with_locale_data(js)
+target_link_libraries(json LibMain)
 target_link_libraries(kcov-example LibMain)
 target_link_libraries(keymap LibKeyboard LibMain)
 target_link_libraries(kill LibMain)