feat: chapter runtime refactoring and related updates

- Refactor chapter runtime: replace window coordinator/snapshot with warmup orchestrator
- Update EPUB core: parser, reading session, JS bridge, navigator layout
- Update reader controller: data source, location resolution, persistence
- Update chapter runtime: data cache, loader, runtime store, disk cache, warmup orchestrator
- Remove deprecated navigation state machine and pagination state
- Update text rendering: book cache, HTML normalizer
- Update UI: text content view, dark image adjuster, text selection controller
- Update settings and reader configuration
- Add CODE_REVIEW.md and AUDIT_FINAL.md documentation
- Update pod dependencies (remove SSAlertSwift, SnapKit)
- Update podspec and pod configuration files

Co-Authored-By: Claude <noreply@anthropic.com>

Sources/RDReaderView/EPUBUI/ReaderController/RDEPUBReaderRuntime.swift

@@ -601,7 +601,6 @@ final class RDEPUBReaderRuntime {
         backgroundPriorityManager.reset()
         backgroundCoverageStore.clearAll()
         chapterWarmupOrchestrator.clear()
-        presentationRuntime.clear()
     }
 
     func handleMemoryWarning() {
@@ -618,6 +617,7 @@ final class RDEPUBReaderRuntime {
             activeWindowSpineIndices: activeWindowIndices,
             protectedSpineIndices: protectedIndices
         )
+        chapterRuntimeStore.handleMemoryWarning()
     }
 
     private func makePartialPageMap(from chapters: [RDEPUBRuntimeChapter]) -> RDEPUBBookPageMap {