feat: Implement the initialization workflow

[CH3CHO]

Ⅰ. Describe what this PR did

Implement the initialization workflow for user to setup the admin account after installation, so no password needs to be specified or generated during installation.

Change details:

1. Auto update the initialization status during start-up based on the current condition of having an admin user in the system, so user doesn't need to re-initialize the account after an update.
2. Redirect to the login page after initialization.
3. No longer present the way of getting the admin credential in the helm chart notes.
4. Remove the random password generation support from helm chart.
5. [Incompatible] Change the property of specifying admin password from admin.password.value to admin.password.

Screenshots:

Ⅱ. Does this pull request fix one issue?

fixes #232

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[johnlanni]

Great!