feat(cfe): add configuration extension skills

Add 5 new skills for 1C configuration extensions (CFE):
- cfe-init: create extension scaffold with Configuration.xml, Languages, Roles
- cfe-borrow: borrow objects from configuration with ObjectBelonging=Adopted
- cfe-patch-method: generate &Перед, &После, &ИзменениеИКонтроль decorators
- cfe-validate: validate extension structure with 9 checks
- cfe-diff: analyze extension and check transfer status

Remove ConfigDumpInfo.xml from cf-init scaffold as it's not required
for 1C configuration source files. Add cfe-guide documentation.

.claude/skills/cfe-patch-method/SKILL.md

@@ -0,0 +1,15 @@
+---
+name: cfe-patch-method
+description: Генерация перехватчика метода в расширении 1С (CFE) — &Перед, &После, &ИзменениеИКонтроль
+argument-hint: -ExtensionPath <path> -ModulePath "Catalog.X.ObjectModule" -MethodName "ПриЗаписи" -InterceptorType Before
+allowed-tools:
+  - Bash
+  - Read
+  - Glob
+---
+
+Генерирует .bsl файл с декоратором перехвата для заимствованного объекта расширения.
+
+```powershell
+powershell.exe -NoProfile -File .claude\skills\cfe-patch-method\scripts\cfe-patch-method.ps1 -ExtensionPath src -ModulePath "Catalog.Контрагенты.ObjectModule" -MethodName "ПриЗаписи" -InterceptorType Before
+```