pre-commit: Format using tofu fmt

[abetomo]

No description provided.

[Copilot]

Pull request overview

Adds OpenTofu formatting support to the repo’s developer tooling, and applies tofu fmt-style formatting updates across Terraform/OpenTofu files.

Changes:

• Add a pre-commit hook to run tofu fmt formatting.
• Install OpenTofu in the GitHub Actions lint workflow to support running the formatter in CI.
• Apply consistent formatting updates across multiple .tf files.

Reviewed changes

Copilot reviewed 2 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
infra/stack/variables.tf	Formatting updates consistent with tofu fmt.
infra/stack/main.tf	Formatting updates in locals/module blocks consistent with tofu fmt.
infra/modules/security_group/variables.tf	Formatting updates consistent with tofu fmt.
infra/modules/iam/main.tf	Formatting updates in IAM policy document blocks consistent with tofu fmt.
infra/modules/ecr/main.tf	Formatting alignment update in lifecycle policy JSON.
infra/modules/alb/variables.tf	Formatting updates consistent with tofu fmt.
infra/environments/shared/main.tf	Formatting updates in resource blocks consistent with tofu fmt.
.pre-commit-config.yaml	Adds tofu_fmt pre-commit hook configuration.
.github/workflows/lint.yml	Adds OpenTofu setup step prior to running pre-commit.

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