Add Tests

[CarlosLeonCode]

Is your feature request related to a problem? Please describe.

A clear and concise description of what the problem is. For example: "I'm always frustrated when..."
Use bats-core for testing modules.

---

Describe the solution you'd like

A clear and concise description of what you want to happen.
Example

#!/usr/bin/env bats

# La función setup se ejecuta antes de cada prueba. Es nuestro laboratorio.
setup() {
  # 1. Añadimos los mocks al PATH
  export PATH="$(pwd)/tests/mocks:$PATH"

  # 2. Cargamos el módulo que queremos probar
  source "modules/git.sh"
}

@test "gs | should call 'git status -sb'" {
  # Ejecuta el comando y captura su salida
  run gs
  
  # Afirma que el comando se ejecutó sin errores (status 0)
  [ "$status" -eq 0 ]

  # Afirma que la salida es la que esperamos de nuestro mock
  [ "$output" = "🐙 Mock 'git' was called with args: status -sb" ]
}

@test "gc | should pass commit message correctly" {
  run gc "A test message"
  [ "$status" -eq 0 ]
  [ "$output" = "🐙 Mock 'git' was called with args: commit -m A test message" ]
}

---

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

---

Additional context

Add any other context or screenshots about the feature request here.