Initial monorepo setup with npm workspaces and dual TypeScript configuration

- Set up npm workspaces for three packages: pi-tui, pi-agent, and pi (pods)
- Implemented dual TypeScript configuration:
  - Root tsconfig.json with path mappings for development and type checking
  - Package-specific tsconfig.build.json for clean production builds
- Configured lockstep versioning with sync script for inter-package dependencies
- Added comprehensive documentation for development and publishing workflows
- All packages at version 0.5.0 ready for npm publishing

packages/tui/src/whitespace-component.ts

@@ -0,0 +1,24 @@
+import type { Component, ComponentRenderResult } from "./tui.js";
+
+/**
+ * A simple component that renders blank lines for spacing
+ */
+export class WhitespaceComponent implements Component {
+	private lines: string[] = [];
+	private lineCount: number;
+	private firstRender: boolean = true;
+
+	constructor(lineCount: number = 1) {
+		this.lineCount = Math.max(0, lineCount); // Ensure non-negative
+		this.lines = new Array(this.lineCount).fill("");
+	}
+
+	render(_width: number): ComponentRenderResult {
+		const result = {
+			lines: this.lines,
+			changed: this.firstRender,
+		};
+		this.firstRender = false;
+		return result;
+	}
+}