⚡ Bolt: [performance improvement] Pre-compile static Regex objects

[LeanBitLab]

💡 What:
Extracted dynamic .toRegex() and Regex(...) invocations from within methods to static-like, top-level private val properties across several Kotlin classes (e.g., LocaleKeyboardInfos.kt, LayoutUtils.kt, SoundPackImporter.kt, etc).

🎯 Why:
In Kotlin, calling String.toRegex() inside a function or a loop creates a new Regex object every time, which has a noticeable compilation overhead. Since the regex patterns are static, there's no need to repeatedly compile them.

📊 Impact:
Eliminates redundant Regex compilation overhead in frequently called loops and layout processing utilities, resulting in faster text splitting, sound pack parsing, and locale validation.

🔬 Measurement:
CPU profiling during string parsing and split operations in LayoutUtils and plugin loading would show a reduction in Regex constructor invocations. Tested via test suite with no functional regressions.

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PR created automatically by Jules for task 17011008600713761384 started by @LeanBitLab

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