refactor(HAI-116): rename kb to hai across all packages, CLI, and docs

- Rename npm packages from @kb/* to @hai/* and update all workspace references
- Rename CLI binary from kb to hai and config directory from .kb to .hai
- Update dashboard UI branding, titles, and references from kb to hai
- Update all test files, CI workflows, and documentation to reflect new naming
- Run comprehensive grep verification to ensure no stale kb references remain

packages/dashboard/app/components/__tests__/Header.test.tsx

@@ -5,7 +5,7 @@ import { Header } from "../Header";
 describe("Header", () => {
   it("renders a logo image with correct src and alt", () => {
     render(<Header />);
-    const logo = screen.getByAltText("hai logo");
+    const logo = screen.getByAltText("kb logo");
     expect(logo).toBeDefined();
     expect(logo.tagName).toBe("IMG");
     expect((logo as HTMLImageElement).src).toContain("/logo.svg");
@@ -13,7 +13,7 @@ describe("Header", () => {
 
   it("renders the logo before the h1 element", () => {
     render(<Header />);
-    const logo = screen.getByAltText("hai logo");
+    const logo = screen.getByAltText("kb logo");
     const h1 = screen.getByRole("heading", { level: 1 });
     // Logo should be a preceding sibling of the h1
     expect(logo.compareDocumentPosition(h1) & Node.DOCUMENT_POSITION_FOLLOWING).toBeTruthy();