yaml selector in manifest json and dbt docs visualization

### Describe the feature
As the number of models grow increasingly we are relying more and more on yaml selectors instead of the command line select . we are able to list is but it is not so easy to visualize these selectors from dbt docs . Adding a visual dag for yaml selector will be very useful for all growing dbt projects in terms of number of models

### Describe alternatives you've considered
dbt list

### Additional context
the search ended up taking to different links , but as of now this is what we observe currently
https://github.com/dbt-labs/dbt-docs/issues/119
https://github.com/dbt-labs/dbt-core/issues/2693
https://github.com/dbt-labs/dbt-core/issues/3873

yaml selector

```selectors:
- name: foo
definition:
method: path
value: models/staging
```

list in command line works

```dbt ls --selector foo
12:43:57 Running with dbt=1.8.3
12:43:58 Registered adapter: snowflake=1.8.3
...
dbt_reference_implementation.staging.test_model
```

but cannot visualize in dag
also selector is empty in manifest json
``` "groups": {},
"selectors": {},
"disabled": {`
```
### Who will this benefit?
All dbt projects with growing number of models