feat(agent): add AgentHarness execution tools

packages/agent/src/harness/tools/index.ts

@@ -0,0 +1,25 @@
+export {
+	type BashSpawnContext,
+	type BashSpawnHook,
+	type BashToolContext,
+	type BashToolDetails,
+	type BashToolInput,
+	type BashToolOptions,
+	createBashTool,
+} from "./bash.ts";
+export {
+	createEditTool,
+	type EditToolContext,
+	type EditToolDetails,
+	type EditToolInput,
+} from "./edit.ts";
+export {
+	createReadTool,
+	type ReadImageProcessor,
+	type ReadImageProcessorResult,
+	type ReadToolContext,
+	type ReadToolDetails,
+	type ReadToolInput,
+	type ReadToolOptions,
+} from "./read.ts";
+export { createWriteTool, type WriteToolContext, type WriteToolInput } from "./write.ts";