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

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
         run: pnpm test
 
       - name: Build standalone binary
-        run: pnpm --filter hai build:exe
+        run: pnpm --filter @dustinbyrne/kb build:exe
 
       - name: Verify binary exists
-        run: test -f packages/cli/dist/hai
+        run: test -f packages/cli/dist/kb