fix: enhance SVG initialization and scaling in card rendering

[joe-sharp]

• Updated the SVG initialization in the MtgCardMaker to include a viewBox for proper scaling.
• Modified the sprite sheet builder to wrap card elements in an SVG tag with a viewBox for consistent rendering.

[Copilot]

Pull Request Overview

This PR enhances SVG rendering and scaling in the MTG card maker by adding proper viewBox attributes to SVG elements. The changes ensure consistent scaling and rendering behavior across different contexts.

• Added viewBox attribute to the main SVG initialization in MtgCardMaker
• Wrapped individual card elements in sprite sheets with their own SVG containers including viewBox for proper scaling

Reviewed Changes

Copilot reviewed 2 out of 12 changed files in this pull request and generated no comments.

File	Description
lib/mtg_card_maker.rb	Added viewBox parameter to main SVG initialization for proper scaling
lib/mtg_card_maker/sprite_sheet_builder.rb	Wrapped card elements in SVG containers with viewBox for consistent rendering in sprite sheets

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