Fix edit tool failing on Windows due to CRLF line endings

Normalize line endings to LF before matching, restore original style on write.
Files with CRLF now match when LLMs send LF-only oldText.

Fixes #355

package-lock.json

@@ -4013,6 +4013,7 @@
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 			"license": "MIT",
+			"peer": true,
 			"engines": {
 				"node": ">=16.9.0"
 			}
@@ -4582,6 +4583,7 @@
 			"resolved": "https://registry.npmjs.org/lit/-/lit-3.3.2.tgz",
 			"integrity": "sha512-NF9zbsP79l4ao2SNrH3NkfmFgN/hBYSQo90saIVI1o5GpjAdCPVstVzO1MrLOakHoEhYkrtRjPK6Ob521aoYWQ==",
 			"license": "BSD-3-Clause",
+			"peer": true,
 			"dependencies": {
 				"@lit/reactive-element": "^2.1.0",
 				"lit-element": "^4.2.0",
@@ -5702,6 +5704,7 @@
 			"resolved": "https://registry.npmjs.org/tailwind-merge/-/tailwind-merge-3.4.0.tgz",
 			"integrity": "sha512-uSaO4gnW+b3Y2aWoWfFpX62vn2sR3skfhbjsEnaBI81WD1wBLlHZe5sWf0AqjksNdYTbGBEd0UasQMT3SNV15g==",
 			"license": "MIT",
+			"peer": true,
 			"funding": {
 				"type": "github",
 				"url": "https://github.com/sponsors/dcastil"
@@ -5730,7 +5733,8 @@
 			"version": "4.1.18",
 			"resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.1.18.tgz",
 			"integrity": "sha512-4+Z+0yiYyEtUVCScyfHCxOYP06L5Ne+JiHhY2IjR2KWMIWhJOYZKLSGZaP5HkZ8+bY0cxfzwDE5uOmzFXyIwxw==",
-			"license": "MIT"
+			"license": "MIT",
+			"peer": true
 		},
 		"node_modules/tapable": {
 			"version": "2.3.0",
@@ -5995,6 +5999,7 @@
 			"resolved": "https://registry.npmjs.org/vite/-/vite-7.3.0.tgz",
 			"integrity": "sha512-dZwN5L1VlUBewiP6H9s2+B3e3Jg96D0vzN+Ry73sOefebhYr9f94wwkMNN/9ouoU8pV1BqA1d1zGk8928cx0rg==",
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"esbuild": "^0.27.0",
 				"fdir": "^6.5.0",