Feat: add env0_projects (plural) data resource

[TomerHeber]

Issue & Steps to Reproduce / Feature Request

resolves #786

Solution

1. Added the new data-source.
2. Added acceptance tests.
3. Updated integration tests.
4. Added an example.

[TomerHeber]

decided to add name and id.
If anything else is required (or removed) let me know.

[razbensimon]

I think we need to provide also those

isArchived?: boolean;
hierarchy: string;
parentProjectId?: string;

The last two are for creating custom logic around sub-projects.
For the first one (isArchived) we may want to filter by it by default. Can we?
and if possible add a parameter to include_archived_projects.

[razbensimon]

I see that we don't have the ability to filter via the API.
So the filter of include_archived_projects should be locally in the provider.
WDYS?

[TomerHeber]

This is the API:
https://docs.env0.com/reference/projects-find-by-organization-id

Will it return archived projects?
What should be the default of include_archived_projects true or false?

I can return the 3 additional values if needed. Just want to be sure there's a use-case for that. If you believe there is. happy to do so. Please confirm.

[razbensimon]

Will it return archived projects?

Yes

What should be the default of include_archived_projects true or false?

false. Meaning we should filter them locally by default.
Add them to the state only if include_archived_projects is true
This makes more sense because I don't see users use the archived ones so much.

[razbensimon]

BTW
hierarchy looks like uuid|uuid|.....
and parentProjectId is just uuid.

parentProjectId returned only on sub-projects.
hierarchy by default equals its own id (if not part of a tree).

[TomerHeber]

@razbensimon - I have added the additional code you requested.

52f69fa

[razbensimon]

LGTM

Edit:
please see

[razbensimon]

Maybe just to make it more synced with real data

Suggested change

	project1 := client.Project{
	Id: "id0",
	Name: "my-project-1",
	ParentProjectId: "p1",
	Hierarchy: "adsas|fdsfsd",
	}
	project2 := client.Project{
	Id: "id1",
	Name: "my-project-2",
	}
	project3 := client.Project{
	Id: "id1",
	Name: "my-project-2",
	IsArchived: true,
	}
	project1 := client.Project{
	Id: "id1",
	Name: "my-project-1",
	Hierarchy: "id1",
	IsArchived: false,
	}
	project2 := client.Project{
	Id: "id2",
	Name: "my-project-2",
	Hierarchy: "id1|id2",
	IsArchived: false,
	ParentProjectId: "id1",
	}
	project3 := client.Project{
	Id: "id3",
	Name: "my-project-3",
	Hierarchy: "id3",
	IsArchived: true,
	}

[razbensimon]

Thanks @TomerHeber