Add SVG export examples for various scenarios

[hxrshxz]

Description

Added 5 complete examples for the Processing SVG library based on the official reference documentation. These examples were previously listed on the Processing website but not bundled with the library.

Changes

Created examples directory with 5 working examples:

1. NoScreenDisplay - Export SVG without opening a display window
2. WithScreenDisplay - Export SVG while displaying on screen using beginRecord()
3. SingleFrameFromAnimation - Capture a single frame from an animated sketch
4. ThreeDGeometry - Export 3D geometry as flattened SVG using beginRaw()
5. UsingCreateGraphics - Programmatically create SVG files using createGraphics()

Closes

Fixes #1290

[Copilot]

Pull Request Overview

This PR adds example code files for the Processing SVG library, demonstrating five different approaches to exporting SVG graphics from Processing sketches.

Key Changes:

• Created examples directory with 5 complete, working SVG export examples
• Each example demonstrates a distinct use case: no display, with display, single frame capture, 3D geometry export, and programmatic creation
• Examples are based on official Processing reference documentation

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
NoScreenDisplay/NoScreenDisplay.pde	Demonstrates SVG export without opening a display window
WithScreenDisplay/WithScreenDisplay.pde	Shows how to export SVG while displaying on screen using beginRecord()
SingleFrameFromAnimation/SingleFrameFromAnimation.pde	Captures a single frame from an animated sketch
ThreeDGeometry/ThreeDGeometry.pde	Exports 3D geometry as flattened SVG using beginRaw()
UsingCreateGraphics/UsingCreateGraphics.pde	Creates SVG files programmatically using createGraphics()

[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.