[apps] Pretty-print offer data

[mojoX911]

Currently the offer data we receive is pretty verbose. It should be compacted to make it readable by the users.

{
    base_fee                
    amount_relative_fee
    time_relative_fee 
    required_confirms
    minimum_locktime
    max_swap_size
    min_swap_size
    fidelity_bond_value:
    tor_addr
}

[0xEgao]

Hey @mojoX911 do you mean this by saying "make it readable by the user"

pub(crate) struct Offer {
    pub(crate) base_fee: u64,                // base fee in sats
    pub(crate) amount_relative_fee_pct: f64, // % fee on total amount
    pub(crate) time_relative_fee_pct: f64,   // amount * refund_locktime * TRF% = fees for locking the fund.
    pub(crate) required_confirms: u32,
    pub(crate) minimum_locktime: u16,
    pub(crate) max_size: u64,
    pub(crate) min_size: u64,
    pub(crate) tweakable_point: PublicKey,
    pub(crate) fidelity: FidelityProof,
}

impl Display for Offer {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(
            f,
            "offer data received:\n\
            - Base fee: {}\n\
            - Percent Fee on total amount: {}\n\
            - Time relative fee: {}\n\
            - Required Confirms: {}\n\
            - Minimum locktime: {}\n\
            - Max size: {}\n\
            - Min size: {}\n\
            - Tweakable Point: {}\n\
            - Fidelity Proof: {:?}",
            self.base_fee,
            self.amount_relative_fee_pct,
            self.time_relative_fee_pct,
            self.required_confirms,
            self.minimum_locktime,
            self.max_size,
            self.min_size,
            self.tweakable_point,
            self.fidelity
        )
    }
}