⚡ Bolt: optimize compareVersions with allocation-free parsing

[TheDragonSoft]

💡 What: Replaced array .split('.') and .map(...) allocations in compareVersions with a single-pass numeric segment parsing loop in src/lib/format.ts.
🎯 Why: compareVersions is used as a comparator in sort functions across the application (e.g., sorting mod releases in InstallModal, VersionsModal, ModDetailsModal, and DependencyPlanModal, as well as filtering changelog entries in InstalledPage). Calling .split() and .map() inside $O(N \log N)$ sort comparisons causes repeated array allocations on hot paths.
📊 Impact: Eliminates array and string allocations during version string comparisons, improving memory efficiency and sort speed during list operations.
🔬 Measurement: Verified with pnpm build (tsc && vite build) and cargo test --manifest-path src-tauri/Cargo.toml.

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PR created automatically by Jules for task 315863973057169575 started by @TheDragonSoft

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