docs: Create COMMANDS.md and link from README (Closes #93)

Author: swatiicfai

COMMANDS.md

@@ -0,0 +1,15 @@
+# MyCMD Command Reference
+
+A comprehensive guide to all commands available in the MyCMD tool.
+
+---
+
+## Command: dir
+
+**Description:** Displays a list of files and subdirectories in a directory.
+
+### Syntax
+
+```bash
+dir [path] [options]
+

README.md

@@ -22,8 +22,11 @@ It mimics the behavior of Windows `cmd.exe` with commands like `dir`, `cd`, `ech
 
 ---
 
-## 📂 Project Structure
-```
+## 📚 Documentation & Command Reference
+
+For a complete guide detailing the syntax, arguments, and options for every command, please see the full [**COMMANDS.md**](COMMANDS.md) file.
+
+---
 MyCMD/
  ┣ README.md                  # Project description, badges, usage
  ┣ pom.xml                    # Maven build config