Feat: add project tags support

[yarden-fishler-dev]

Add tags field to env0_project resource and data sources (env0_project, env0_projects).

Changes

• Add Tags []string to Project, ProjectCreatePayload, and ProjectUpdatePayload client structs
• Add tags as an Optional attribute on env0_project resource
• Add tags as a Computed attribute on env0_project and env0_projects data sources
• Add unit tests for create and update with tags
• Regenerate mocks and update docs

QA

Tested manually against PR environment with locally built provider:

• Create project with tags ["env", "zero"]
• Create project without tags
• Remove tags from existing project (update to empty)
• Re-add tags to existing project
• Destroy both projects
• Data source reads tags — created source project with tags, read via data "env0_project", and passed tags to a consumer project
• Update source project tags and verify data source + consumer project update accordingly
• Destroy source, data source, and consumer projects

[RLRabinowitz]

Run go fmt please for formatting

[yarden-fishler-dev]

3212304

[RLRabinowitz]

Prefer adding omitempty here I think, in order to not have the tags field in the JSON appear at all if there are no tags
Same for create and update payload

[yarden-fishler-dev]

We've discussed this face to face, adding omitempty will also omit empty array, which might interfere with update actions that would like to remove all tags explicitly by putting [] in the request