feat(migrate): rewrite triple-slash reference types during migration (#660)

Add regex-based rewriting of `/// <reference types="..." />` directives
in the migration tool. These cannot be handled by ast-grep because
triple-slash references are parsed as comment nodes, not AST nodes.

Supports all the same mapping rules as import/declare-module rewriting:

- vite → vite-plus
- vitest/config → vite-plus (special case)
- vitest → vite-plus/test
- `@vitest/*` → vite-plus/test/*



Respects SkipPackages logic for peerDependencies/dependencies.

closes VP-130

Author: fengmk2

Cargo.lock

@@ -11,6 +11,7 @@ ast-grep-config = { workspace = true }
 ast-grep-core = { workspace = true }
 ast-grep-language = { workspace = true }
 ignore = { workspace = true }
+regex = { workspace = true }
 serde_json = { workspace = true, features = ["preserve_order"] }
 vite_error = { workspace = true }