[CT-3156] [Developer Portal] Define Simple Service Maturity Matrix

### Housekeeping

- [X] I am a maintainer of dbt-core

### Short description

To begin to standardize the repos across teams, develop a definition of service health.

This should include
- the service has an owner defined
- Basic docs check to start - GitHub repositories have at least a `README.md`
- dependabot PRs are less than 2 weeks old

Other possibilities
- minimum supported python version [this is complicated as all projects don't define it the same way - would probably have to leverage tags]
- OSS repos have a `Contributing.md`
- OSS repos have a license defined
- OSS has cla bot configured [not sure how to do this]

### Acceptance criteria

Basic service health has been defined

### Impact to Other Teams

None

### Will backports be required?

No

### Context

Checks will be defined in https://github.com/dbt-labs/dbt-core/issues/8713.