refactor(deps): restructured codebase to use centralized pi-utils package

- Created new @oh-my-pi/pi-utils workspace package with shared utilities for logging, process management, stream handling, and temporary directory management.
- Migrated all packages to use centralized logger from @oh-my-pi/pi-utils instead of local winston implementations.
- Replaced custom process spawning and stream reading implementations with standardized cspawn and readLines utilities across all modules.
- Converted synchronous file operations and process spawning to async patterns using Bun shell syntax and fs/promises.
- Added streaming edit abort functionality with configurable setting to abort on patch preview failures.
- Updated test framework from vitest to bun:test across all test suites.

packages/coding-agent/test/tools/python-execution.test.ts

@@ -1,7 +1,5 @@
 import { describe, expect, it, vi } from "bun:test";
-import { mkdtempSync, rmSync } from "node:fs";
-import { tmpdir } from "node:os";
-import { join } from "node:path";
+import { createTempDirSync } from "@oh-my-pi/pi-utils";
 import * as pythonExecutor from "../../src/core/python-executor";
 import type { ToolSession } from "../../src/core/tools/index";
 import { PythonTool } from "../../src/core/tools/python";
@@ -30,7 +28,7 @@ function createSession(cwd: string): ToolSession {
 
 describe("python tool execution", () => {
 	it("passes kernel options from settings and args", async () => {
-		const tempDir = mkdtempSync(join(tmpdir(), "python-tool-"));
+		const tempDir = createTempDirSync("@python-tool-");
 		const executeSpy = vi.spyOn(pythonExecutor, "executePython").mockResolvedValue({
 			output: "ok",
 			exitCode: 0,
@@ -40,10 +38,10 @@ describe("python tool execution", () => {
 			stdinRequested: false,
 		});
 
-		const tool = new PythonTool(createSession(tempDir));
+		const tool = new PythonTool(createSession(tempDir.path));
 		const result = await tool.execute(
 			"call-id",
-			{ code: "print('hi')", timeout: 5, workdir: tempDir, reset: true },
+			{ code: "print('hi')", timeout: 5, workdir: tempDir.path, reset: true },
 			undefined,
 			undefined,
 			undefined,
@@ -52,9 +50,9 @@ describe("python tool execution", () => {
 		expect(executeSpy).toHaveBeenCalledWith(
 			"print('hi')",
 			expect.objectContaining({
-				cwd: tempDir,
+				cwd: tempDir.path,
 				timeout: 5000,
-				sessionId: `session:session-file:workdir:${tempDir}`,
+				sessionId: `session:session-file:workdir:${tempDir.path}`,
 				kernelMode: "per-call",
 				reset: true,
 			}),
@@ -63,6 +61,6 @@ describe("python tool execution", () => {
 		expect(text).toBe("ok");
 
 		executeSpy.mockRestore();
-		rmSync(tempDir, { recursive: true, force: true });
+		tempDir.remove();
 	});
 });