feat(ipuaro): add read tools (v0.5.0)

- ToolRegistry: tool lifecycle management, execution with validation
- GetLinesTool: read file lines with line numbers
- GetFunctionTool: get function source using AST
- GetClassTool: get class source using AST
- GetStructureTool: directory tree with filtering

121 new tests, 540 total

packages/ipuaro/src/infrastructure/index.ts

@@ -2,3 +2,4 @@
 export * from "./storage/index.js"
 export * from "./indexer/index.js"
 export * from "./llm/index.js"
+export * from "./tools/index.js"