feat: add terraform-cli support

[jdvivar]

This PR adds support for Terraform CLI, here are explained what directories are included: https://developer.hashicorp.com/terraform/cli/config/config-file

Local test run ✅

I was initially not able to test the changes locally, the instructions say:

from the top-most folder (mackup) run make develop that replaces the currently installed mackup with the local modified one

from https://github.com/lra/mackup/blob/master/doc/README.md#locally-test-an-application-before-submitting-a-pull-request

However make develop returns:

$ make develop
make: *** No rule to make target `develop'.  Stop.

The correct instructions should let you know you should use poetry instead. Installing with brew install poetry (rather that pipx), then running poetry install --with dev, then poetry run mackup with whatever option you want to test, in my case just poetry run mackup backup --force. So update the instructions and/or link to the docs/developing.md file.

It correctly syncs my Terraform CLI files when running locally.

Test Results ✅

$ make test
poetry install --with dev
Installing dependencies from lock file

No dependencies to install or update

Installing the current project: mackup (0.8.40)
poetry run pytest
========================================================= test session starts ==========================================================
platform darwin -- Python 3.12.3, pytest-7.4.4, pluggy-1.4.0
rootdir: /Users/danielvivar/Repos/mackup
collected 30 items                                                                                                                     

tests/test_config.py .............                                                                                               [ 43%]
tests/test_main.py ..                                                                                                            [ 50%]
tests/test_utils.py ...............                                                                                              [100%]

========================================================== 30 passed in 0.16s ==========================================================

All submissions

• I have followed the Contributing Guidelines
• I have checked to ensure there aren't other open Pull Requests for the same update/change

Adding/updating Application X Support

• This PR is only for one application
• It has been added to the list of supported applications in the README
• Changes have been added to the WIP section of the CHANGELOG
• Syncing does not break the application
• Syncing does not compete with any syncing functionality internal to the application
• The configuration syncs the minimal set of data
• No file specific to the local workstation is synced
• No sensitive data is synced

Improving the Mackup codebase

• My submission passes the tests
• I have linted the code locally prior to submission
• I have written new tests as applicable
• I have added an explanation of what the changes do

[Kol9yN]

Bump! @lra