feat: add getalby wallet as funding source (#2086)

* initial scaffolding, methods for getalby wallet
* Add getAlby to docs and i18n
* update alby wallet methods
* change names from GetAlbyWallet to AlbyWallet
* remove unused variables in AlbyFundingSource in settings.py
* rename getalby.py to alby.py
* fix method auth and status
* resolve rolznz commented issues
* rename ALBY_API_KEY to ALBY_ACCESS_TOKEN
* fix desc hash in create_invoice

---------

Co-authored-by: Pavol Rusnak <pavol@rusnak.io>
Co-authored-by: dni ⚡ <office@dnilabs.com>

docs/guide/wallets.md

@@ -8,7 +8,7 @@ nav_order: 3
 Backend wallets
 ===============
 
-LNbits can run on top of many lightning-network funding sources. Currently there is support for CoreLightning, LND, LNbits, LNPay and OpenNode, with more being added regularly.
+LNbits can run on top of many lightning-network funding sources. Currently there is support for CoreLightning, LND, LNbits, LNPay, Alby, and OpenNode, with more being added regularly.
 
 A backend wallet can be configured using the following LNbits environment variables:
 
@@ -79,6 +79,14 @@ For the invoice to work you must have a publicly accessible URL in your LNbits.
 - `OPENNODE_API_ENDPOINT`: https://api.opennode.com/
 - `OPENNODE_KEY`: opennodeAdminApiKey
 
+### Alby
+
+For the invoice to work you must have a publicly accessible URL in your LNbits. No manual webhook setting is necessary. You can generate an alby access token here: https://getalby.com/developer/access_tokens/new
+
+
+- `LNBITS_BACKEND_WALLET_CLASS`: **AlbyWallet**
+- `ALBY_API_ENDPOINT`: https://api.getalby.com/
+- `ALBY_ACCESS_TOKEN`: AlbyAccessToken
 
 ### Cliche Wallet