feat: improve error message for missing cluster_id in dbutils

[RamiNoodle733]

Summary

Improves the error message when users try to use dbutils without configuring a cluster_id.

Problem

When calling dbutils.help() or any dbutils method without setting up a cluster, users would get a generic error:

DatabricksError: Missing required field: cluster_id

This doesn't help users understand how to fix the issue.

Solution

The new error message provides clear resolution steps:

cluster_id is required in the configuration to use dbutils. Please configure a cluster_id using one of the following methods:
  1. Set the DATABRICKS_CLUSTER_ID environment variable
  2. Add cluster_id to your ~/.databrickscfg profile
  3. Pass cluster_id directly to the Config object: Config(cluster_id='your-cluster-id')

For more information, see: https://docs.databricks.com/en/dev-tools/sdk-python.html#configure-cluster-id

Changes

• Updated _cluster_id property in RemoteDbUtils class to provide a detailed error message with:
  • Clear explanation of why the error occurred
  • Three different methods to configure cluster_id
  • Link to relevant documentation

Closes #51

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• PR number: 1248
• Commit SHA: 697306d79ed87eb14a020e37147928939c06e568

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