chore(docs): expand paying fees page with mana and fee analysis#19955

AztecBot merged 1 commit intonextAztecProtocol/aztec-packages:nextfrom

josh/ecodr-701-gas-estimation-mana-costs-update-feejuice-refs-to-manaAztecProtocol/aztec-packages:josh/ecodr-701-gas-estimation-mana-costs-update-feejuice-refs-to-manaCopy head branch name to clipboard