luci-proto-modemmanger: add missing proto options

Added options for signal refresh rate and Debugmode.

Added logging level option

Signed-off-by: valexi7 <44439515+valexi7@users.noreply.github.com>

luci-proto-modemmanger: add missing proto options

Changed logging level translations according to OpenWRT standards

Signed-off-by: valexi7 <44439515+valexi7@users.noreply.github.com>