Refactor edit strategies and confidence validation in unified diff processing

- Enhanced the applyContextMatching and applyDMP functions to improve handling of context and edit changes.
- Updated confidence validation logic to ensure stricter checks, now requiring a minimum confidence of 1 for successful edits.
- Refined the way changes are processed, including better tracking of removal and addition changes.
- Improved the validation of edit results by incorporating strategy-specific checks and logging for better debugging.
- Adjusted the applyEdit function to ensure strategies are applied in a more robust manner, with clearer handling of debug mode.

src/core/diff/strategies/new-unified/index.ts

@@ -160,7 +160,7 @@ Your diff here
 		startLine?: number,
 		endLine?: number
 	): Promise<DiffResult> {
-		const MIN_CONFIDENCE = 0.9
+		const MIN_CONFIDENCE = 1
 		const parsedDiff = this.parseUnifiedDiff(diffContent)
     const originalLines = originalContent.split("\n")
 		let result = [...originalLines]
@@ -170,7 +170,7 @@ Your diff here
 			const { index: matchPosition, confidence } = findBestMatch(contextStr, result)
 
 			const editResult = await applyEdit(hunk, result, matchPosition, confidence)
-			if (editResult.confidence > MIN_CONFIDENCE) {
+			if (editResult.confidence >= MIN_CONFIDENCE) {
 				result = editResult.result
 			} else {
 				return { success: false, error: `Failed to apply edit using ${editResult.strategy} strategy` }