Provide tfvars references for variable blocks

[radeksimko]

Current Version

v0.20.1

Current State

Users currently benefit from being able to lookup references via a context menu by right-clicking to a variable block, e.g. finding all references (var.example) for

variable "example" {
}

Users can also see the total number of references within a module via code lens above the variable block in VS Code or other supported clients.

Use-cases

Variables can be referenced in variable (tfvars) files and users would benefit from seeing variable references in these files as well, both when looking via the context menu and code lens.

Additionally when requesting definition for a tfvars entry, the corresponding variable block is returned.

Proposal

terraform-schema

• Modify schema.SchemaForVariables() such that uses OriginForTarget as introduced in Introduce LocalOrigin + PathOrigin & schema.PathTarget hcl-lang#94 and used already for module references in schema: Use OriginForTarget to connect module inputs w/ variables terraform-schema#82

[github-actions]

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