Initial release

Directory improvements (#8)

* Metrics endpoint

* Dark mode

* Display ledger principal, freezing period

* Indicator for each token whether it is frozen or not

* Request number of assets in the ledger for asset id check

* Some small improvements

* CI fixes

* Fix directory.did

* Tests fix, mock ledger api

* Generate declarations for mock_ledger before tests in CI

* Add test related to asset id check

* Fix async tests

* bump moc and dfx versions

* bump promtracker dependency

* bump @hadronous/pic to 0.6.0

* yarn upgrade

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Co-authored-by: Timo Hanke <t@timohanke.org>