Monorepo has new linting and formatting preferences. Updated the
`--full` to reflect that.
<!-- CURSOR_SUMMARY -->
---
> [!NOTE]
> **Low Risk**
> Low risk: changes only affect the generated `--full` project template
and CLI help surface (flag is now hidden), plus a patch version bump.
>
> **Overview**
> Updates `arcade new --full` to be *internal-only* by hiding the flag
and revises the full template to match monorepo conventions
(Ruff/pre-commit versions and hook IDs, `.ruff.toml` now extends the
repo config, `pyproject.toml` formatting/booleans, adds `pytest`
`asyncio_mode`, and removes `pre-commit install` from the template
`Makefile`).
>
> Adds a regression test ensuring generated full-template files match
these conventions, and bumps the root package version to `1.12.2`.
>
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
2c1a285752d67dc4dd1aa8e0b6f25ca2f0a33fa2. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->
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