Add component tests @goruha (#19)

# What * [x] Add `basic` component test * [x] Add `disabled` component test * [x] Test component drifting * [ ] Add any additional use case tests

Why

Test basic component features
Verify that the component does not create any resources when input enabled: false set
Verify that the component does not drift on a second run with the same inputs
Add test for any additional than basic use cases for the component

References

New Features
- Introduced comprehensive test fixtures and configuration files for Terraform components, including VPC, EKS cluster, DNS, ArgoCD, and GitHub repository setups.
- Added a Go-based test suite for automated testing of Terraform components, supporting setup, teardown, and validation scenarios.
- Provided vendoring manifest for managing external Terraform component sources.
Chores
- Added .gitignore for test directory to exclude generated and temporary files.
- Added Go module dependencies for the test suite.
Bug Fixes
- Improved Terraform notification configuration to handle disabled states and missing keys safely.
Refactor
- Simplified local variable usage in provider configuration for Helm integration.
- Simplified GitHub provider token retrieval and configuration logic.
Style
- Updated module versions for remote state management to ensure consistency.
Revert
- Removed obsolete test script (test/run.sh).

Update README.md and docs @[cloudposse-releaser[bot]](https://github.com/apps/cloudposse-releaser) (#22)

## what This is an auto-generated PR that updates the README.md and docs

To have most recent changes of README.md and doc from origin templates

Update README.md and docs @[cloudposse-releaser[bot]](https://github.com/apps/cloudposse-releaser) (#18)

## what This is an auto-generated PR that updates the README.md and docs

To have most recent changes of README.md and doc from origin templates