fix(diff): handle VcsException and log diff before error #51

The `DiffSimplifier` class now includes a logger to capture any errors that occur during the diff calculation process. If an error is thrown, the original diff is logged before the exception is re-thrown, providing more context for debugging purposes.

Author: phodal

src/main/kotlin/cc/unitmesh/devti/vcs/DiffSimplifier.kt

@@ -73,7 +73,7 @@ class DiffSimplifier(val project: Project) {
 
             originChanges = writer.toString()
             return postProcess(originChanges)
-        } catch (e: VcsException) {
+        } catch (e: Exception) {
             if (originChanges.isNotEmpty()) {
                 logger.info("Error calculating diff: $originChanges", e)
             }