feat: add terraform refresh command (#33)

## what
- Add `terraform refresh` in our task commands so it's similar to
`terraform [plan | apply]`

## why
- There are situations where we need `terraform refresh` while migrating
state from local to a remote backend.

## references
- masterpointio/mp-infra#211


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- New Features
  - Added a Terraform task to refresh state for a selected environment.
- Uses environment-specific variables file and supports additional
Terraform arguments.
  - Includes a pre-run check to ensure the variables file exists.
- Behavior aligns with existing Terraform tasks for a consistent
workflow.
  - Runs quietly in the current working directory to reduce noise.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: westonplatter

lib/terraform/Taskfile.yml

@@ -74,3 +74,20 @@ tasks:
         msg: "Variables file does not exist: {{.TFVARS_FILE}}"
     cmds:
       - terraform apply -var-file {{.TFVARS_FILE}} {{.TF_ARGS}}
+
+  refresh:
+    desc: Refresh the Terraform state to match the real-world infrastructure (safer via apply -refresh-only).
+    summary: |
+      Refreshes the Terraform state for a specified environment, using a file to load the variables.
+      Note: Upstream deprecates `terraform refresh`; use `terraform apply -refresh-only` to review changes before writing state.
+      Requires a variables file specific to the environment to be present.
+      Usage: task terraform:refresh -- ENVIRONMENT [terraform apply -refresh-only arguments]
+      Example: task terraform:refresh -- automation
+    dir: "{{.USER_WORKING_DIR}}"
+    silent: true
+    vars: *vars
+    preconditions:
+      - sh: test -f {{.TFVARS_FILE}}
+        msg: "Variables file does not exist: {{.TFVARS_FILE}}"
+    cmds:
+      - terraform apply -refresh-only -var-file {{.TFVARS_FILE}} {{.TF_ARGS}}