Proposal: Initialize a git repository and create an initial commit on scaffold

[ryohidaka]

Description

When scaffolding a new project with vp create, there is no built-in way to
initialize a git repository.
Users need to manually run git init and
git add -A && git commit -m "Initial commit" after scaffolding, which is
a common step in every new project setup.

Adding a flag (e.g. --git) would streamline the project creation flow and bring
vp create in line with other popular scaffolding tools (e.g. create-next-app,
nuxt init) that offer git initialization out of the box.

Suggested solution

Add a --git / --no-git flag to vp create.

• In interactive mode, prompt the user with a confirm dialog (default: No)
• In non-interactive mode, default to skipping git initialization
• When enabled, run git init before installing dependencies,
  then git add -A && git commit -m "Initial commit from Vite+" after formatting completes

API:
vp create vite:application --git # always initialize
vp create vite:application --no-git # always skip

Alternative

No response

Additional context

No response

Validations

• Read the Contributing Guidelines.
• Confirm this request is for Vite+ itself and not for Vite, Vitest, tsdown, Rolldown, or Oxc.
• Check that there isn't already an issue requesting the same feature.