remove invoices (#1515)

* remove invoices

* remove invoices tests

* remove unused tests/extensions dir

* fix issue

* formatting

* test passing locally. and i dont know why

* fix _extension_dir loading

* gitkeep extension dir

* formatting

* remove bundle from check

* do not prettier compliled css

* do not prettier compliled css

* create extension dir, if it does not exists, just to be sure

* Update lnbits/extension_manager.py

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Co-authored-by: calle <93376500+callebtc@users.noreply.github.com>

.gitignore

@@ -44,5 +44,5 @@ docker
 fly.toml
 
 # Ignore extensions (post installable extension PR)
-extensions/
-upgrades/
+extensions/*
+upgrades/