feat: add shfmt pre-commit hooks for bash script formatting

[Patrick-Ehimen]

Summary

Implements automatic bash script formatting using shfmt to maintain consistency across the codebase. This PR adds pre-commit hooks that automatically format bash scripts on commit, and provides justfile recipes for manual formatting.

Changes

• Added shfmt to lint-staged configuration (.lintstagedrc.js)

  • Automatically formats *.sh files on commit with 2-space indentation
  • Uses -s flag to simplify code structure

• Added justfile recipes (justfile)

  • bash-check (alias: bashc) - Check bash script formatting without modifying
  • bash-write (alias: bashw) - Format bash scripts
  • Integrated both into full-check and full-write recipes

• Updated documentation (CONTRIBUTING.md)

  • Added shfmt to prerequisites with installation instructions for macOS, Ubuntu, and manual download
  • Documented what just full-check verifies

• Formatted existing bash scripts with 2-space indentation

  • scripts/bash/deploy-programs.sh - Reformatted with consistent 2-space indentation
  • scripts/bash/prepare-artifacts.sh - Added final newline

Test Plan

• Installed shfmt v3.12.0 and verified it works
• Ran bash -n syntax check on both scripts - both valid
• Tested lint-staged with staged bash files - works correctly
• Tested justfile recipes (bash-check, bash-write) - work correctly
• Verified pre-commit hook runs automatically on commit

Resolves

Closes #246

[andreivladbrg]

thanks for the PR @Patrick-Ehimen

currently, the implementation does not add the pre-commit hook that the issue is referring to

please see here what we are referring to: https://github.com/sablier-labs/lockup/blob/main/.husky/pre-commit

[Patrick-Ehimen]

thanks for the PR @Patrick-Ehimen

currently, the implementation does not add the pre-commit hook that the issue is referring to

please see here what we are referring to: https://github.com/sablier-labs/lockup/blob/main/.husky/pre-commit

i will take a look at it before eod