Merge updated documentation for SpriteAI Quick Start Guide

[dev-docs-github-app-dev]

This pull request merges the updated documentation for the SpriteAI Quick Start Guide into the default branch. The updates include:

• Addition of a new README.md file with a comprehensive quick start guide.
• Introduction of a dev-docs/quickstart.md file providing detailed instructions and examples for using SpriteAI.

Key Changes:

• README.md: Added a quick start guide covering prerequisites, installation, basic usage (generating character spritesheets and pixel art), additional effects, configuration, supported methods, error handling, and notes.
• dev-docs/quickstart.md: Included an expanded quickstart guide with an overview, prerequisites, installation, basic usage examples (generating character spritesheets, pixel art, and landscape sprites), advanced image processing techniques, configuration, error handling, supported styles and options, next steps, troubleshooting tips, and support information.

Impact:
These documentation updates provide clear, detailed instructions and examples for developers to quickly start using SpriteAI, enhancing their experience and enabling them to leverage the library's capabilities more effectively.

Motivation:
The updates were driven by the need to create a comprehensive quick start guide based on the team-dev-docs/spriteAI index.js as requested by Tim.

[dev-docs-github-app-dev]

This pull request was created by AI Agent. Please review the changes and provide feedback. Context used:

{
  "docFilesToCreate": [
    "dev-docs/quickstart.md"
  ],
  "docFilesToUpdate": [
    "README.md"
  ],
  "relevantCodeFiles": {
    "team-dev-docs/spriteAI": [
      "index.js",
      "dev-docs/general.md",
      "dev-docs/context-index.js.md",
      "dev-docs/populate.md",
      "dev-docs/reference.md",
      "spriteAI/package.json",
      "dev-docs/misc-project_setup.md",
      "spriteAI/README.md"
    ]
  },
  "relevantDocsFiles": [
    "docs/getting-started.md",
    "README.md",
    "docs/generateSprite.md",
    "docs/changelogs/changelog-2025-04-15.md",
    "docs/generatePixelArt.md"
  ]
}

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Name	Status	Preview	Comments	Updated (UTC)
spriteai-dev-docs	❌ Failed (Inspect)			Jun 27, 2025 10:42pm