Add WinPython support and testing (#330)

Fixes #96

Introduce support for detecting WinPython environments.

## Changes
- Add new \pet-winpython\ crate for WinPython environment detection
- Add \WinPython\ to \PythonEnvironmentKind\ and \LocatorKind\ enums
- Integrate WinPython locator into the locator chain
- Update JSONRPC documentation

## Detection Strategy
WinPython environments are identified by:
1. Marker files: \.winpython\ or \winpython.ini\ in parent directories
2. Directory naming pattern: \WPy64-*\, \WPy32-*\, or \WPy-*\
3. Python folder naming: \python-X.Y.Z.amd64\ or \python-X.Y.Z\

## Testing
Added 14 tests covering directory/folder name patterns, version
extraction, marker file detection, and locator trait verification.

Author: karthiknadig

Cargo.lock

@@ -56,6 +56,7 @@ pub enum LocatorKind {
     Venv,
     VirtualEnv,
     VirtualEnvWrapper,
+    WinPython,
     WindowsRegistry,
     WindowsStore,
 }

crates/pet-core/src/lib.rs

@@ -28,6 +28,7 @@ pub enum PythonEnvironmentKind {
     Venv,
     VirtualEnv,
     VirtualEnvWrapper,
+    WinPython,
     WindowsStore,
     WindowsRegistry,
 }

crates/pet-core/src/python_environment.rs

@@ -0,0 +1,17 @@
+[package]
+name = "pet-winpython"
+version = "0.1.0"
+edition = "2021"
+license = "MIT"
+
+[dependencies]
+pet-core = { path = "../pet-core" }
+pet-fs = { path = "../pet-fs" }
+pet-python-utils = { path = "../pet-python-utils" }
+pet-virtualenv = { path = "../pet-virtualenv" }
+log = "0.4.21"
+lazy_static = "1.4.0"
+regex = "1.10.4"
+
+[dev-dependencies]
+tempfile = "3.10"

crates/pet-winpython/Cargo.toml

@@ -0,0 +1,32 @@
+# WinPython Locator
+
+This crate provides support for detecting [WinPython](https://winpython.github.io/) environments.
+
+## Detection Strategy
+
+WinPython environments are identified by looking for:
+
+1. **Marker files**: `.winpython` or `winpython.ini` file in parent directories
+2. **Directory naming pattern**: Parent directory matching patterns like `WPy64-*`, `WPy32-*`, or `WPy-*`
+3. **Python folder naming**: The Python installation folder typically follows the pattern `python-X.Y.Z.amd64` or `python-X.Y.Z`
+
+## Typical WinPython Directory Structure
+
+```
+WPy64-31300/                          # Top-level WinPython directory
+├── .winpython                        # Marker file (may also be winpython.ini)
+├── python-3.13.0.amd64/              # Python installation
+│   ├── python.exe
+│   ├── pythonw.exe
+│   ├── Scripts/
+│   └── Lib/
+├── scripts/                          # WinPython-specific scripts
+│   ├── env.bat
+│   └── WinPython Command Prompt.exe
+├── settings/                         # Settings directory
+└── notebooks/                        # Optional Jupyter notebooks
+```
+
+## Platform Support
+
+This locator only works on Windows, as WinPython is a Windows-only distribution.