chore: Refactor mobile build scripts to use Melos

Updated Makefile, mobile.mk, and melos.yaml to centralize mobile app build, start, and code generation commands using Melos scripts. Added info and install-melos commands for easier onboarding and workspace setup. Documentation updated to reflect staff app naming and new command structure.

docs/05-project-onboarding-master.md

@@ -1,7 +1,7 @@
 # KROW Workforce Platform - Project Onboarding Master Document
 
-> **Version:** 1.0
-> **Last Updated:** 2026-01-11
+> **Version:** 1.1
+> **Last Updated:** 2026-01-22
 > **Purpose:** Source of Truth for Team Onboarding & Sprint Planning
 
 ---
@@ -173,7 +173,7 @@ graph TB
    │   ├── mobile/
    |   |  ├── apps/  
    |   |  │   ├── client/       # Flutter (business app)
-   |   |  │   └── worker/       # Flutter (worker app)
+   |   |  │   └── staff/       # Flutter (staff app)
    ├── backend/
    │   ├── dataconnect/       # Firebase Data Connect schemas
    │   └── functions/         # Cloud Functions
@@ -312,7 +312,7 @@ sequenceDiagram
     participant Client as Client App
     participant API as Backend API
     participant Admin as Admin
-    participant Staff as Worker App
+    participant Staff as Staff App
 
     Note over Client,API: 1. Event Creation
     Client->>API: Create Event with Shifts & Positions
@@ -706,9 +706,9 @@ These **must be ported** from legacy:
 
 ---
 
-#### 4.7.2 Mobile Worker App (Flutter)
+#### 4.7.2 Mobile Staff App (Flutter)
 
-**Location:** `internal/launchpad/prototypes-src/mobile/apps/worker/`
+**Location:** `internal/launchpad/prototypes-src/mobile/apps/staff/`
 
 **Routes (35+ screens):**