Supported configs (meta, enabled, group) for semantic models

[FishtownBuildBot]

At a minimum, update body to include a link to the page on docs.getdbt.com requiring updates and what part(s) of the page you would like to see updated.

Relevant PRs: dbt-labs/dbt-core#8754, dbt-labs/dbt-core#8766

Pages to update:

• https://docs.getdbt.com/reference/resource-configs/meta
• https://docs.getdbt.com/reference/resource-configs/enabled
• https://docs.getdbt.com/reference/resource-configs/group
• https://docs.getdbt.com/reference/resource-properties/config
• https://docs.getdbt.com/docs/build/semantic-models

New things for semantic_models:

• meta can now be nested under a config key (config added in #8754)
• enabled can now be nested under a config key (config added in #8502)
• group can now be nested under a config key (config added in #8502)

Examples

This page should add a "Semantic models" tab that includes an example like the following:

models/semantic_models.yml

semantic_models:
  - name: semantic_people
    model: ref('people')
    config:
      meta: {<dictionary>}

And this page should have an example like this:

models/semantic_models.yml

semantic_models:
  - name: semantic_people
    model: ref('people')
    config:
      enabled: false

And this page include examples like this:

schema.yml

semantic_models:
  - name: model_name
    config:
      group: finance

dbt_project.yml

semantic-models:
  [<resource-path>](resource-path):
    +group: finance

[dbeatty10]

In case anyone uses this issue description for its code examples, I just now fixed the code examples that I originally wrote incorrectly.