Fix duplicate class error from mismatched package declarations

[Copilot]

Build failed with duplicate class Controller.Home due to incorrect package declarations. Files in src/main/java/controller/ (lowercase) declared package Controller; (uppercase), conflicting with files in src/main/java/Controller/.

Changes

• Consolidated 8 controller files into correct Controller/ directory based on package declaration
• Removed duplicate Home.java from lowercase controller/ directory
• Deleted empty controller/ directory

Technical Context

Java package names must match directory structure. All files declared package Controller; but were split across two directories differing only in case:

controller/Home.java:     package Controller;  // ❌ directory mismatch
Controller/Home.java:     package Controller;  // ✅ correct

This created duplicate class definitions on case-sensitive filesystems, failing compilation.

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