[DOCS, FIX] edit pre-commit hooks, update FastAPI-fastkit guides

[bnbong]

Requesting Merging

Description

edit pre-commit hooks & update FastAPI-fastkit dev guides to current version

Type of Change

• BUG FIX
• ADDING NEW TEMPLATE
• FEATURE ADDED/UPDATED
• HOTFIX
• DELETING UNNECESSARY FEATURES
• DOCUMENTATION & DEVOPS
• Etc..

Test Environment

local, M1 Mac, Windows 11

Major Changes

• remove coverage test & template inspection hooks at pre-commit
  • pre-commit now checks source linting, formatting independently of the system(SYSTEM_PATH config).
  • coverage test will triggered automatically when making PR
  • template inspection also triggered automatically by Github Actions when making PR of adding new template or editing existing template at fastapi_project_template
• update development guides: CONTRIBUTING.md, docs/en materials

Screenshots (optional)

N/A

Etc

close #38

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull request overview

Updates developer tooling/docs so local pre-commit hooks no longer depend on system-installed formatters/linters, and moves template-change inspection feedback into a PR-triggered GitHub Actions workflow (aligning with issue #38).

Changes:

• Refactors .pre-commit-config.yaml to run Black/Isort/Mypy via language: python hook envs (no more language: system scripts).
• Adds “Template PR Inspection” GitHub Actions workflow to validate changed templates and comment results on PRs.
• Updates contributing/development documentation to reflect the revised workflows and commands.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 12 comments.

Show a summary per file

File	Description
env.example	Simplifies translation env example; removes optional token/provider notes.
docs/en/contributing/template-creation-guide.md	Documents that template PRs are automatically inspected via CI.
docs/en/contributing/development-setup.md	Updates dev setup and pre-commit guidance; adds env var notes.
docs/en/contributing/code-guidelines.md	Updates documented pre-commit configuration example and removes flake8 mention.
CONTRIBUTING.md	Adds CI template inspection description; updates pre-commit checklist.
.pre-commit-config.yaml	Reworks hooks to use isolated Python environments with tool deps.
.github/workflows/template-pr-inspection.yml	New PR workflow that inspects changed templates and comments results.

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