feat: add `data "equinix_fabric_cloud_routers"` data source to product suite

[thogarty]

• Cloud router data source only supports retrieving cloud router by UUID which isn't as useful when UUID isn't known
• New data_source supports search filters/pagination/sorting to retrieve a very specific Cloud Router or a list of Cloud Routers
• Supporting API documentation: https://app.swaggerhub.com/apis/equinix-api/fabric/4.13#/Cloud%20Routers/searchCloudRouters

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 51.30112% with 131 lines in your changes are missing coverage. Please review.

Project coverage is 53.69%. Comparing base (503d9e1) to head (a2f35ce). Report is 40 commits behind head on main.

Files	Patch %	Lines
equinix/resource_fabric_cloud_router.go	0.00%	129 Missing :warning:
equinix/data_source_fabric_cloud_router.go	98.09%	2 Missing :warning:

:exclamation: Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #678 +/- ## =========================================== + Coverage 37.91% 53.69% +15.77% =========================================== Files 120 149 +29 Lines 19476 21698 +2222 =========================================== + Hits 7384 11650 +4266 + Misses 11884 9605 -2279 - Partials 208 443 +235 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[ctreatma]

The ship may have sailed on this one, but in the future when adding a new resource or data source, I encourage you to add it in a separate, dedicated package under internal/resources/fabric/ rather than adding more stuff to the equinix package. (If you do that, I would recommend continuing to use terraform-plugin-sdk/v2 and saving the migration to terraform-plugin-framework for later.) That will avoid adding new things that need to be refactored in the future.

[thogarty]

The ship may have sailed on this one, but in the future when adding a new resource or data source, I encourage you to add it in a separate, dedicated package under internal/resources/fabric/ rather than adding more stuff to the equinix package. (If you do that, I would recommend continuing to use terraform-plugin-sdk/v2 and saving the migration to terraform-plugin-framework for later.) That will avoid adding new things that need to be refactored in the future.

@ctreatma , I'm following up with a few more so I'll keep that in mind. 👍