Merge pull request #46 from kir-rescomp/dev

add common questions to git episode

Author: DininduSenanayake

docs/4.git_model_commands.md

@@ -436,4 +436,45 @@ flowchart TB
   F --> G[Merge complete ✓]
   style A fill:#ffe6e6,stroke:#f00
   style G fill:#e6ffe6,stroke:#0f0
-```
+```
+
+## Common Questions
+
+
+??? question "Why do I need the staging area? Can't I just commit directly?"
+    The staging area gives you control! You can:
+    
+    - Commit only related changes together
+    - Review changes before committing
+    - Keep work-in-progress unstaged
+    - Create clean, logical commit history
+    
+    Many Git tools allow skipping staging (`git commit -a`), but understanding it makes you a better Git user.
+
+??? question "What's the difference between Git and GitHub?"
+    - **Git** = Version control software (runs on your computer)
+    - **GitHub** = Website for hosting Git repositories (in the cloud)
+    
+    Think of it like:
+    - Git = Microsoft Word
+    - GitHub = Google Docs
+    
+    We'll cover GitHub in detail later!
+
+??? question "Can I use Git for non-code projects?"
+    Absolutely! Git works great for:
+    
+    - Documentation (Markdown, LaTeX)
+    - Design files (if text-based)
+    - Configuration files
+    - Writing (books, articles)
+    - Any text files that change over time
+
+??? question "How much space does Git use?"
+    Git is surprisingly efficient! It:
+    
+    - Compresses data
+    - Stores only changes (internally)
+    - Removes duplicates
+    
+    A repo with years of history might only be a few MB.