accessor: revised the usage with the modern tvg accessor style

[hermet]

issue: thorvg/thorvg#4217

[Copilot]

Pull request overview

Updates the Accessor example to use the newer ThorVG accessor workflow for reaching SVG internals, including ID-based traversal and direct lookup of SVG nodes.

Changes:

• Enables SVG internal accessibility on tvg::Picture before loading the SVG.
• Reworks the accessor traversal callback to identify and modify a node by SVG ID ("star").
• Keeps (and clarifies) a second approach using direct access via picture->paint(tvg::Accessor::id(...)).

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[hermet]

required: thorvg/thorvg#4294

[Copilot]

Pull request overview

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

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[Copilot]

Spelling/grammar in comments: "demonstartes" should be "demonstrates", and the phrasing "allow accessing to svg internals" is ungrammatical (consider "allow access to SVG internals").

Suggested change

	picture->accessible = true; // allow accessing to svg internals, it must be set before svg load call.
	picture->load(EXAMPLE_DIR"/svg/favorite_on.svg");
	picture->size(w, h);
	/* 1. This demonstartes a traversing the internal scene tree of the SVG picture. */
	picture->accessible = true; // Allow access to SVG internals; it must be set before the SVG load call.
	picture->load(EXAMPLE_DIR"/svg/favorite_on.svg");
	picture->size(w, h);
	/* 1. This demonstrates traversing the internal scene tree of the SVG picture. */