create questpdf demo

[defymecobra]

This pull request introduces a new QuestPDF Ivy demo application, providing a complete setup to generate PDF documents using the QuestPDF library within an Ivy app. The changes include a new demo app with Markdown-based PDF generation, supporting code structure, a sample resume, and development tooling for Codespaces and VS Code.

New PDF Demo Application:

• Added QuestPdfApp in Apps/QuestPdfApp.cs that lets users edit Markdown, configure PDF settings (title, page size, orientation, margins), insert Markdown snippets, and preview/download generated PDFs.
• Included a sample Markdown resume in Assets/Resume.md for demonstration.

Markdown Parsing and PDF Generation Support:

• Introduced a set of Markdown parsing helpers in Helpers/MarkdownHelper.cs for recognizing headings, lists, tables, code blocks, and inline formatting.
• Added a Markdown document model in Models/MarkdownElement.cs to represent parsed elements for PDF rendering.
• Defined PdfSettings in Models/PdfSettings.cs to handle page size, orientation, and margins for PDF generation.

Project Setup and Tooling:

• Created .devcontainer/questpdf/devcontainer.json for Codespaces/VS Code development with .NET SDK, Ivy tools, port forwarding, and recommended extensions.
• Added QuestPdfDemo.csproj for project configuration, dependencies (Ivy, QuestPDF), and embedded resources.
• Updated .gitignore to exclude build artifacts and IDE files.

App Initialization and Documentation:

• Implemented Program.cs to initialize the Ivy app, configure QuestPDF licensing, set up Chrome UI, and provide links to Codespaces and source code.
• Added README.md with instructions and project description.
• Set up GlobalUsings.cs for streamlined imports and namespace management.

[Copilot]

Pull Request Overview

This PR creates a comprehensive QuestPDF demo application that demonstrates PDF generation capabilities using the QuestPDF library within an Ivy framework application. The demo includes markdown parsing and PDF rendering functionality.

• Creates a complete QuestPDF demo with markdown-to-PDF conversion
• Implements modular services for PDF generation and markdown parsing
• Provides an interactive UI for editing markdown and previewing generated PDFs

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
questpdf/Services/PdfGenerationService.cs	Core PDF generation service with inline markdown parsing and rendering
questpdf/Services/MarkdownParsingService.cs	Structured markdown parsing service (alternative approach)
questpdf/Apps/QuestPdfApp.cs	Main application UI with live preview and download functionality
questpdf/Models/PdfSettings.cs	Configuration model for PDF generation settings
questpdf/Models/MarkdownElement.cs	Data models for structured markdown elements
questpdf/Helpers/MarkdownHelper.cs	Utility functions for markdown detection and parsing
questpdf/Program.cs	Application entry point and server configuration
questpdf/GlobalUsings.cs	Global using statements for the project
questpdf/QuestPdfDemo.csproj	Project file with dependencies
questpdf/README.md	Project documentation
questpdf/Assets/Resume.md	Sample markdown content for demonstration
questpdf/.gitignore	Git ignore configuration
.devcontainer/questpdf/devcontainer.json	Development container configuration

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