[Feature] S3 Mock for Local server

[tnt-hsopjani]

Description:
It would be very useful if Herd could provide a built-in S3-compatible mock service for local development.

Many Laravel applications use S3-compatible storage for file uploads, media libraries, backups, and temporary files. During local development, developers usually need to configure external services like AWS S3, MinIO, or LocalStack manually. This adds extra setup complexity, especially for teams working across multiple projects.

Proposed Feature:
Add an optional local S3 mock service inside Herd that can run together with local sites.

Expected Capabilities:

• S3-compatible endpoint for local development
• Easy enable/disable from the Herd UI
• Automatic local endpoint, access key, secret key, bucket name, and region
• Support for common Laravel filesystem configuration
• Ability to create/manage local buckets
• Local file persistence between restarts
• Simple documentation/example .env configuration

Example Laravel .env:

FILESYSTEM_DISK=s3
AWS_ACCESS_KEY_ID=local
AWS_SECRET_ACCESS_KEY=local
AWS_DEFAULT_REGION=us-east-1
AWS_BUCKET=local-bucket
AWS_ENDPOINT=http://localhost:9000
AWS_USE_PATH_STYLE_ENDPOINT=true

Why this is useful:
This would make local development much easier for applications that depend on S3 storage, without requiring developers to install and configure additional tools manually.

Benefit:
It would improve Herd as a complete local development environment for modern Laravel applications, especially projects that rely on cloud-like services locally.