This commit adds protocol update and impl of premium.
* Swap In
    * Responder/Taker requests Premium,
    Maker adds it to Opening Tx (Taker collects Premium in Claim tx)
* Swap Out
    * Responder/Maker requests Premium
    and Taker tops it up on Claim invoice
     (Maker collects Premium on Claim invoice)

This commit includes the premium rate in the poll message
so that the premium set for each peer can be confirmed.

This commit adds premium options.
Also, the sample settings and document have been updated accordingly.

This commit is to modify and add integration tests
for the addition of premium.

Add item to peerSwapPeer to display
Premium Rate Ppm.
Set the value retrieved from the poll so that it
can be checked with the ListPeers command.

Corrected where to get premium limit at swapout in
CheckPremiumAmount and OnSwapOutRequestReceived.
Also, unit tests for CheckPremiumAmount have been added.

I rearranged the order of commands for swapin.

When the reload policy was done,
the configuration values were updated, but they were not displayed.

Definitions are being added so that they are displayed.

Allow setting different premium values for BTC and LBTC.

This change also enables users to configure individual premiums for
each peer, providing more granular control over pricing and
liquidity.

- Added separate premium fields for BTC and LBTC.
- Implemented logic to apply peer-specific premiums.