Initial commit: Discord stock price bot with hourly PYPL updates

Implemented Discord bot for automated stock price tracking and reporting with the following features:

- Hourly PayPal (PYPL) stock price updates during NYSE market hours
- Custom branding for PYPL as "Steaks Stablecoin Value"
- Manual stock price queries via !stock and !price commands
- Multi-provider stock API support (Yahoo Finance and Finnhub)
- NYSE market hours detection with holiday awareness
- Discord embed formatting with color-coded price changes
- Docker containerization for consistent deployment
- Comprehensive documentation and deployment guides

Technical stack:
- Python 3.9+ with discord.py
- Finnhub API for stock price data
- APScheduler for hourly automated updates
- Docker support for local and Unraid deployment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

stock_api/base.py

@@ -0,0 +1,39 @@
+from abc import ABC, abstractmethod
+from typing import Optional, Dict, Any
+
+
+class StockAPIBase(ABC):
+    """
+    Abstract base class for stock price data providers.
+    This design allows seamless switching between different stock APIs.
+    """
+
+    @abstractmethod
+    def get_stock_price(self, ticker: str) -> Optional[Dict[str, Any]]:
+        """
+        Retrieve current stock price and related data for a given ticker.
+
+        Args:
+            ticker: Stock ticker symbol (e.g., 'PYPL', 'AAPL')
+
+        Returns:
+            Dictionary containing:
+                - ticker: str
+                - current_price: float
+                - previous_close: float
+                - change_dollar: float
+                - change_percent: float
+                - market_open: bool
+            Returns None if ticker is invalid or data unavailable.
+        """
+        pass
+
+    @abstractmethod
+    def is_available(self) -> bool:
+        """
+        Check if the API service is currently available.
+
+        Returns:
+            True if API is accessible, False otherwise.
+        """
+        pass