feat: Blink funding source (#2477)

* feat: Blink funding source

* chore: make bundle

* Blink review 01 (#2575)

* refactor: mark `graphql_query` as private (`_` prefix)

* feat: set default value for `blink_api_endpoint`

* fix: raise if HTTP call failed

* refactor: move private method to the bottom

* refactor: make `wallet_id` a property

* fix: key mapping for attribute

* chore: fix `mypy`

* chore: fix `make check`

* refactor: extract query strings

* refactor: extract `BlinkGrafqlQueries` class

* chore: code clean-up

* chore: add `try-catch`

* refactor: extract `tx_query`

* chore: format grapfhql queries

* fix: set funding source class

* chore: `make format`

* fix: test by following the other patterns

* Update docs/guide/wallets.md

Co-authored-by: openoms <43343391+openoms@users.noreply.github.com>

* feat: add websocket connection to blink (#2577)

* feat: add websocket connection to blink

* feat: close websocket on shutdown

* feat: add `blink_ws_endpoint` to the UI

* fix: use `SEND` tx for `settlementFee`

* refactor: remove `else` when `if` has `return`

* fix: remove test env file

---------

Co-authored-by: bitkarrot <73979971+bitkarrot@users.noreply.github.com>
Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>
Co-authored-by: openoms <43343391+openoms@users.noreply.github.com>

lnbits/static/js/components/lnbits-funding-sources.js

@@ -110,6 +110,15 @@ Vue.component('lnbits-funding-sources', {
             lnbits_key: 'Admin Key'
           }
         ],
+        [
+          'BlinkWallet',
+          'Blink',
+          {
+            blink_api_endpoint: 'Endpoint',
+            blink_ws_endpoint: 'WebSocket',
+            blink_token: 'Key'
+          }
+        ],
         [
           'AlbyWallet',
           'Alby',