chore: Rename project to copier-template-extensions

[pawamoy]

Issue-13: #13

@sisp once merged and published we'd simply rename this repository copier-template-extensions, and I'd publish a last release of copier-templates-extensions with basically this code:

"""Deprecated. Install `copier-template-extensions` instead."""

import warnings

from copier_template_extensions import ContextHook, TemplateExtensionLoader

__all__: list[str] = ["ContextHook", "TemplateExtensionLoader"]

warnings.warn(
    "This package is deprecated and renamed `copier-template-extensions`. "
    "Please install `copier-template-extensions` instead, and replace every occurrence "
    "of `copier-templates-extensions` and `copier_templates_extensions` in your template with "
    "`copier-template-extensions` and `copier_template_extensions` respectively.",
    DeprecationWarning,
    stacklevel=2,
)

[sisp]

Sounds good. Let me know when you'd like me to rename the project.

[pawamoy]

Merged, released, and renamed! (I had the privileges to do so 👍)

[pawamoy]

copier-templates-extensions 0.3.2 published too, with deprecation warning and re-export of new paths.

[sisp]

Awesome, copier-template-extensions reads much better! 🤩