add initial feedback code

[RobotSail]

This PR introduces a simple way of gathering feedback, using an SQLite database and the streamlit-feedback component.

Feedback data is stored in a single table with the schema:

CREATE TABLE IF NOT EXISTS feedback (
  id integer PRIMARY KEY AUTOINCREMENT,
  type text NOT NULL,
  score text NOT NULL,
  text text,
  timestamp text NOT NULL
);

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[RobotSail]

The build checks are failing only because secrets aren't provided to pull requests. Specifically the image build is trying to login but GitHub won't provide it with the credentials.

[oindrillac]

The database is created in our openshift space and the UI works as expected https://ui-api-doc-gen.apps.platform-sts.pcbk.p1.openshiftapps.com/

We can make some UI enhancements like the position of the feedback component and the exact choice of buttons.

But this is an awesome start @RobotSail Thanks for putting this together quickly LGTM

[hemajv]

@RobotSail this looks great! Thanks for the quick additions 👍