Add formal code review

code_review.md

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+# Formal Code Review: HTTPie CLI
+
+## 🔗 Repository
+
+Fork: https://github.com/Bibosss/cli
+
+## 🔍 Review Scope
+
+### Reviewed Aspects:
+
+-   [x] Code style (PEP8)
+-   [x] Error handling
+-   [x] Documentation
+-   [x] Test coverage
+-   [x] Security vulnerabilities
+-   [x] Project structure
+
+---
+
+## 🛠 Tools Used
+
+### ✅ `flake8`
+
+-   Result: no major style issues found
+-   Comment: code style is well-maintained and consistent
+
+### ⚠️ `bandit`
+
+-   Observations: use of `assert` found in production code
+    -   Example: `httpie/models.py`
+    -   **Recommendation:** replace `assert` with `if` + `raise Exception(...)` to ensure checks are not stripped in optimized mode
+
+### ❌ `mypy`
+
+-   Output: `Found 268 errors in 44 files`
+-   Comment: many functions and modules lack type hints
+-   **Recommendation:** progressively add `type hints` starting with:
+    -   `httpie/client/dispatch/`
+    -   `httpie/core.py`
+
+---
+
+## ✍️ Code Comments (TODO / FIXME)
+
+**`httpie/models.py`:**
+
+```python
+# FIXME: Avoid using assert in production code; use if + raise instead.
+```