Introduce error recovery mechanisms with retry logic and circuit breaker integration.

- Added `ErrorRecovery.cc` and `ErrorRecovery.h` for retry and circuit breaker implementations.
- Enhanced swap file handling with transient error retries and exponential backoff (e.g., ENOSPC, EDQUOT).
- Integrated circuit breaker into SwapManager to gracefully handle repeated failures, prevent system overload, and enable automatic recovery.
- Updated `DEVELOPER_GUIDE.md` with comprehensive documentation on error recovery patterns and graceful degradation strategies.
- Refined fsync, temp file creation, and swap file logic with retry-on-failure mechanisms for improved resilience.

CMakeLists.txt

@@ -144,6 +144,7 @@ set(COMMON_SOURCES
         Swap.cc
         ErrorHandler.cc
         SyscallWrappers.cc
+        ErrorRecovery.cc
         TerminalInputHandler.cc
         TerminalRenderer.cc
         TerminalFrontend.cc
@@ -341,6 +342,7 @@ if (BUILD_TESTS)
             Swap.cc
             ErrorHandler.cc
             SyscallWrappers.cc
+            ErrorRecovery.cc
             KKeymap.cc
             SwapRecorder.h
             OptimizedSearch.cc