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/streaming-render-debug.ts

@@ -8,6 +8,7 @@ import { readFileSync } from "node:fs";
 import { join } from "node:path";
 import type { AssistantMessage } from "@oh-my-pi/pi-ai";
 import { ProcessTerminal, TUI } from "@oh-my-pi/pi-tui";
+import { sleep } from "bun";
 import { AssistantMessageComponent } from "../src/modes/interactive/components/assistant-message";
 import { initTheme } from "../src/modes/interactive/theme/theme";
 
@@ -32,10 +33,6 @@ if (!thinkingContent || thinkingContent.type !== "thinking") {
 const fullThinkingText = thinkingContent.thinking;
 const fullTextContent = textContent && textContent.type === "text" ? textContent.text : "";
 
-async function sleep(ms: number): Promise<void> {
-	return new Promise((resolve) => setTimeout(resolve, ms));
-}
-
 async function main() {
 	const terminal = new ProcessTerminal();
 	const tui = new TUI(terminal);