feat: install wizard on first launch (#1977)

* Login form loading

* add first install middleware and settings

* updates

* Login form loading

* add first install middleware and settings

* updates

* only set first install when superuser is created

* refactor first install

* only show if first install

* cleanup

* set password

* update calls

* login superuser on first install

* fix

* fixup!

* fixup!

* fixup!

* fixup!

* fixup!

* last fixup!

* fix mypy and prettier CI errors

* disable first install

* add random super user

* set first install after startup

* remove user id from form

* Update lnbits/core/views/auth_api.py

Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>

* Update lnbits/core/views/auth_api.py

Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>

* Update lnbits/middleware.py

Co-authored-by: dni ⚡ <office@dnilabs.com>

* addressing Vlad's comments

* remove super user

* move to transient settings

* fix: show `first_install` page even after a server restart

* fix: do not add `user_id` in the auth token

* fix: `make check` errors

* fix: `username` is not optional for `UpdateSuperuserPassword`

* feat: nicer error message

---------

Co-authored-by: dni ⚡ <office@dnilabs.com>
Co-authored-by: Tiago Vasconcelos <talvasconcelos@gmail.com>
Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>

lnbits/app.py

@@ -52,6 +52,7 @@ from .middleware import (
     CustomGZipMiddleware,
     ExtensionsRedirectMiddleware,
     InstalledExtensionMiddleware,
+    add_first_install_middleware,
     add_ip_block_middleware,
     add_ratelimit_middleware,
 )
@@ -107,6 +108,8 @@ def create_app() -> FastAPI:
 
     register_custom_extensions_path()
 
+    add_first_install_middleware(app)
+
     # adds security middleware
     add_ip_block_middleware(app)
     add_ratelimit_middleware(app)