maintenance: refresh pre-commit config and unify setup scripts across platforms

[Endkind]

• maintenance: bump pre-commit tool versions (pre-commit-hooks v6.0.0, black 25.9.0, isort 6.1.0)
• maintenance: replace Windows setup.bat with setup.cmd and add setup.ps1
• maintenance: harden setup.sh (set -euo pipefail), improve messages, install order, and run pre-commit install
• maintenance: standardize setup flow (.venv creation, activate, upgrade pip, install pre-commit & hooks, install requirements if present)

[Copilot]

Pull Request Overview

This maintenance PR refreshes the pre-commit configuration and standardizes setup scripts across Unix, Windows CMD, and PowerShell environments. The changes bump pre-commit tool versions and replace platform-specific setup scripts with improved versions that follow a unified flow.

• Updates pre-commit tool versions (pre-commit-hooks v6.0.0, black 25.9.0, isort 6.1.0)
• Replaces setup.bat with setup.cmd and adds new setup.ps1 for PowerShell support
• Hardens setup.sh with stricter error handling and improves messaging consistency

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
.pre-commit-config.yaml	Updates tool versions for pre-commit hooks, black, and isort
setup.sh	Adds stricter error handling, improved messaging, and standardized flow
setup.ps1	New PowerShell setup script with error handling and consistent messaging
setup.cmd	New CMD setup script replacing setup.bat with standardized flow
setup.bat	Removed old Windows batch file

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[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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