fix(pyproject): correct dev dependency name and add CLI entry point

[brunobrown]

This PR fixes two issues in the pyproject.toml that prevent the CLI from working and break dependency resolution with uv.

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What was fixed

1. 🔧 Invalid dependency name

• Replaced buil (typo) with the correct build in [project.optional-dependencies.dev].
• The typo caused the following error during installation:

2. 🚀 Missing CLI entry point

• Added the [project.scripts] section to register the fletx CLI command:

[project.scripts]
fletx = "fletx.__main__:main"

• This enables terminal execution like:

fletx new my_app --no-install

• Without this, users encounter:

error: Failed to spawn: `fletx`
Caused by: No such file or directory (os error 2)

How to test

Here’s the exact procedure used to test this fix:

• Option 1: With pip only

1. cd /path/to/fletx

2. pip install -e .

3. fletx new my_app --no-install

✅ CLI should work as expected.

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• Option 2: With uv

1. Run uv build in the root of the forked FletX project.

2. Created a new Python project elsewhere.

3. In that project’s pyproject.toml, added the dependency pointing to the local fork:

dependencies = [
    "fletx @ file:///path/to/your/local/fletx",
]

6. Run uv sync to install all dependencies (including the local fletxr).

7. Tested the CLI with:

uv run fletx new fletx_login_migration --no-install

✅ CLI should work as expected.

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Let me know if you want me to adjust anything!
Thanks for this amazing project - I'm happy to contribute.

[Einswilli]

Thanks!
This looks cleaner🎉