feat: add support for nsx edge clusters

[spacegospod]

Summary of Pull Request

Creating a new resource for Edge Clusters. The lifecycle of the new resource is based on the public API and supports creation, expansion and shrinkage.

Edge Cluster deletion is not included in this iteration since it is not officially supported by the API. A workaround has been provided (see delete context for details)

Formatted all .tf files with terraform fmt -recursive.

Type of Pull Request

• [ ] This is a bug fix.
• [X] This is an enhancement or feature.
• [ ] This is a code style/formatting update.
• [ ] This is a documentation update.
• [ ] This is a refactoring update.
• [ ] This is a chore update
• [ ] This is something else. Please describe:

Related to Existing Issues

Closes #111

Test and Documentation Coverage

Added a new acceptance test suite for the new resource

accLog.txt

For bug fixes or features:

• [X] Tests have been completed.
• [X] Documentation has been added/updated.

Breaking Changes?

• [ ] Yes, there are breaking changes.
• [X] No, there are no breaking changes.

[github-actions[bot]]

I'm going to lock this pull request because it has been closed for 30 days. This helps our maintainers find and focus on the active issues.

If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.