Independent Full House Rules for Guest Portal

Currently, the house rules displayed in the Guest Portal are pulled from channel-specific fields (Airbnb, Vrbo, etc.). Because these channels have strict character limits, hosts are unable to provide their full, detailed house rules to guests via the portal without them being truncated or restricted.

Requested Change: Add a dedicated "Full House Rules" text field in Hospitable that is independent of the booking channels. This field should be the primary source for the house rules section in the Guest Portal, allowing hosts to share comprehensive rules regardless of channel limitations.