feat: Add shfmt

[martimlobao]

• add shfmt to apps
• format existing shell scripts
• add shfmt to CI

Summary by Sourcery

Add shfmt to the project for shell script formatting and integrate it into the CI workflow.

New Features:

• Integrate shfmt into the project to autoformat shell script source code.

CI:

• Add shfmt to the CI workflow to ensure consistent shell script formatting.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR adds shfmt, a shell script formatting tool, to the development toolchain. The implementation includes adding shfmt to the list of applications and configuring it in the CI pipeline alongside existing shell script analysis tools.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Add shfmt tool to the application list	Add shfmt as a Homebrew formula with description	apps.toml
Configure shfmt in CI workflow	Add new shfmt job in the lint workflow Configure shfmt with simplified formatting option (-s) Use luizm/action-sh-checker action for shell script formatting	.github/workflows/lint_pr.yaml

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[sourcery-ai]

Hey @martimlobao - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider consolidating the shellcheck and shfmt steps using a single luizm/action-sh-checker action since it supports both tools, which would simplify the workflow.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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