bug: escape backticks in svg text

[saurabhhhcodes]

Escapes backticks in SVG/XML text output so user-controlled strings cannot break out of attributes.\n\nValidation:\n- npm test -- --run lib/svg/generator.escapeXML.test.ts lib/svg/generator.test.ts\n\nCloses #5264

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👋 Hey @saurabhhhcodes! Thanks for your interest in contributing to CommitPulse! 🙏

Unfortunately, this PR has been automatically closed because you are not assigned to the linked issue #5264 — bug: Escape all special XML characters to prevent SVG attribute injection.

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[Aamod-Dev]

Solid escaping! I went through the changes and ensuring backticks are safely escaped inside SVG text nodes prevents malformed XML strings from breaking the image parser.
Labels applied:

• level:intermediate: String escaping logic.
• quality:clean: Protects the XML generator.
• ype:bug: Fixes rendering crashes.