[Feature] Add Configuration Object to Semantic Manifest

[plypaul]

Is this your first time submitting a feature request?

• I have read the expectations for open source contributors
• I have searched the existing issues, and I could not find an existing issue for this feature
• I am requesting a straightforward change to existing dbt-semantic-interfaces functionality, rather than a Big Idea better suited to a discussion

Describe the feature

As requested by @marcodamore - it would be useful to have a configuration object in the semantic manifest to hold configuration options like:

{ 
  "project_config": {
      "dsi_version_number": 123,
      "timespine": {
          "location": "transform.metricflow_time_spine",
          "column_name": "date_day",
          "grain": "daily",
      }
   }
}

Describe alternatives you've considered

No response

Who will this benefit?

No response

Are you interested in contributing this feature?

No response

Anything else?

No response