feat(skd-edit): add patch-query operation for substring replacement in queries

Addresses user feedback: set-query is all-or-nothing, and editing XML
directly is fragile due to escaping. patch-query allows targeted string
replacement via "old => new" shorthand, with batch mode support.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/skills/cases/skd-edit/patch-query.json

@@ -0,0 +1,21 @@
+{
+  "name": "Точечная замена в тексте запроса",
+  "preRun": [
+    {
+      "script": "skd-compile/scripts/skd-compile",
+      "input": {
+        "dataSets": [{
+          "name": "Основной",
+          "query": "ВЫБРАТЬ 1 КАК Поле",
+          "fields": ["Поле"]
+        }]
+      },
+      "args": { "-DefinitionFile": "{inputFile}", "-OutputPath": "{workDir}/Template.xml" }
+    }
+  ],
+  "params": {
+    "templatePath": "Template.xml",
+    "operation": "patch-query",
+    "value": "1 КАК Поле => Т.Наименование КАК Имя"
+  }
+}