* nut-19 sign mint quote
* ephemeral key for quote
* `mint` adjustments + crypto/nut19.py
* wip: mint side working
* fix import
* post-merge fixups
* more fixes
* make format
* move nut19 to nuts directory
* `key` -> `privkey` and `pubkey`
* make format
* mint_info method for nut-19 support
* fix tests imports
* fix signature missing positional argument + fix db migration format not correctly escaped + pass in NUT-19 keypair to `request_mint` `request_mint_with_callback`
* make format
* fix `get_invoice_status`
* rename to xx
* nutxx -> nut20
* mypy
* remove `mint_quote_signature_required` as per spec
* wip edits
* clean up
* fix tests
* fix deprecated api tests
* fix redis tests
* fix cache tests
* fix regtest mint external
* fix mint regtest
* add test without signature
* test pubkeys in quotes
* wip
* add compat
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Co-authored-by: callebtc <93376500+callebtc@users.noreply.github.com>
