chore: migrate to uv for dependency management

- Replace `requirements.txt` with `pyproject.toml` + `uv.lock` (runtime
  deps in `[project]`, lint/format tools in `[dependency-groups].dev`).
- Pin Python via `.python-version` (3.14) so uv provisions the right
  interpreter automatically.
- Turn the root `main.py` stub from `uv init` into a thin launcher that
  delegates to `src/main.py`, so `uv run main.py` just works without
  restructuring the flat imports inside `src/`.
- Update README Prerequisites / Installation / Usage to uv workflow.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Junyi-99

.python-version

@@ -0,0 +1 @@
+3.14

README.md

@@ -35,7 +35,7 @@ This project has been tested and works perfectly on macOS, Windows and WSL2 (see
 Ensure you have the following installed on your system:
 
 - Google Chrome
-- Python3
+- [uv](https://docs.astral.sh/uv/) (Python package manager; handles Python install automatically)
 
 ## Installation
 
@@ -47,18 +47,24 @@ Ensure you have the following installed on your system:
     cd ChatGPT-API-Scanner
     ```
 
-2. Install required pypi packages
+2. Install dependencies (uv reads `pyproject.toml` / `uv.lock` and provisions the matching Python version from `.python-version`):
 
     ```bash
-    pip install selenium tqdm openai rich
+    uv sync
+    ```
+
+    To include dev tools (pylint, flake8, ruff):
+
+    ```bash
+    uv sync --all-groups
     ```
 
 ## Usage
 
 1. Run the main script:
 
     ```bash
-    python3 src/main.py
+    uv run main.py
     ```
 
 2. You will be prompted to log in to your GitHub account in the browser. Please do so.
@@ -81,13 +87,13 @@ Examples:
 
 ```bash
 # Start scanning from iteration 100
-python3 src/main.py --from-iter 100
+uv run main.py --from-iter 100
 
 # Only check existing keys
-python3 src/main.py --check-existed-keys-only
+uv run main.py --check-existed-keys-only
 
 # Use custom keywords and languages
-python3 src/main.py -k "openai" "chatgpt" -l python javascript
+uv run main.py -k "openai" "chatgpt" -l python javascript
 ```
 
 ## Results

main.py

@@ -0,0 +1,7 @@
+import runpy
+import sys
+from pathlib import Path
+
+SRC = Path(__file__).parent / "src"
+sys.path.insert(0, str(SRC))
+runpy.run_path(str(SRC / "main.py"), run_name="__main__")

pyproject.toml

@@ -0,0 +1,19 @@
+[project]
+name = "chatgpt-api-scanner"
+version = "0.1.0"
+description = "Scan GitHub for leaked OpenAI API keys (for security research)"
+readme = "README.md"
+requires-python = ">=3.14"
+dependencies = [
+    "openai>=2.32.0",
+    "rich>=15.0.0",
+    "selenium>=4.43.0",
+    "tqdm>=4.67.3",
+]
+
+[dependency-groups]
+dev = [
+    "pylint>=3.0.0",
+    "flake8>=7.0.0",
+    "ruff>=0.2.0",
+]