Add passwords generation to FerretDB

Walkthrough

The changes include an update to the version number in the Chart.yaml file from 0.3.0 to 0.4.0. Additionally, a new Kubernetes Role resource is defined in dashboard-resourcemap.yaml, granting access to services and secrets. The init-script.yaml has been modified to improve user credential management by dynamically generating passwords or retrieving them from an existing Secret, enhancing security practices.

Changes

Files	Change Summary
`packages/apps/ferretdb/Chart.yaml`	Version updated from `0.3.0` to `0.4.0`.
`packages/apps/ferretdb/templates/dashboard-resourcemap.yaml`	New Role resource defined for managing access to services and secrets, dynamically named based on the release name.
`packages/apps/ferretdb/templates/init-script.yaml`	Initialization script modified to retrieve or dynamically generate user passwords, replacing hardcoded assignments with a more secure and flexible approach.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant SecretManager
    participant RoleManager

    User->>SecretManager: Request user credentials
    SecretManager->>SecretManager: Retrieve existing Secret
    SecretManager->>SecretManager: Decode passwords
    SecretManager->>User: Return passwords

    User->>SecretManager: No password provided
    SecretManager->>SecretManager: Generate random password
    SecretManager->>SecretManager: Create new Secret with credentials
    SecretManager->>RoleManager: Define Role for access
    RoleManager->>User: Grant access to resources

Poem

Hop, hop, hooray, what a change today!
New secrets and roles, in a secure ballet.
Passwords now dance, both fresh and bright,
In the land of Kubernetes, all feels just right!
With each little tweak, we leap and we bound,
In our fluffy world, joy and safety abound! 🐇✨

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aenix-io / cozystack