Add e2e test using opentofu cli

e2e-test/README.md

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+# End-to-End Testing
+
+This directory contains a complete end-to-end test setup for the terraform-provider-tor.
+
+## Quick Start
+
+1. **Setup development environment:**
+   ```bash
+   ./setup-dev.sh
+   ```
+   This script will:
+   - Create local `.terraformrc` with dev overrides (no global config changes)
+   - Build and install the provider locally
+
+2. **Run the test:**
+   ```bash
+   ./tf plan
+   ./tf apply
+   ```
+   
+   Or using the full command:
+   ```bash
+   TF_CLI_CONFIG_FILE=.terraformrc terraform plan
+   TF_CLI_CONFIG_FILE=.terraformrc terraform apply
+   ```
+   
+   Note: Skip `terraform init` when using dev overrides - it's not needed and may cause errors.
+
+3. **Clean up:**
+   ```bash
+   ./tf destroy
+   ```
+
+## Troubleshooting
+
+If you encounter issues:
+
+1. **Provider not found**: Run `./setup-dev.sh` again
+2. **Build errors**: Check that Go >= 1.23 is installed
+3. **Permission errors**: Ensure the setup script is executable
+
+## Resetting
+
+To reset your Terraform configuration:
+```bash
+rm -rf .terraform/ .terraform.lock.hcl terraform.tfstate*
+```
+
+Then run the setup and init process again.