Added Prompt for tools (#68)

* Create detailed markdown instructions for all toolkits
* Update all toolkit classes to load instructions from external .md files
* Add query examples for cryptocurrency report generation

src/app/api/tools/instructions/symbols_instructions.md

@@ -0,0 +1,97 @@
+# Crypto Symbols Tool - Instructions
+
+## Purpose
+Cryptocurrency symbol lookup and name-based search using cached Yahoo Finance database.
+
+## Tools (2)
+
+### 1. `get_all_symbols()` → list[str]
+Returns all available cryptocurrency symbols from cache. No API calls, instant response.
+
+**Returns:** List like `["BTC-USD", "ETH-USD", "SOL-USD", ...]` (~1,500+ symbols)
+
+**Use Cases:**
+- Verify symbol availability before API call
+- List all supported cryptocurrencies
+- Validate user input against known symbols
+
+### 2. `get_symbols_by_name(query: str)` → list[tuple[str, str]]
+Searches cryptocurrency names (case-insensitive, substring match). Returns list of (symbol, name) tuples.
+
+**Examples:**
+```python
+get_symbols_by_name("bitcoin")  # [("BTC-USD", "Bitcoin USD"), ("BCH-USD", "Bitcoin Cash USD"), ...]
+get_symbols_by_name("ethereum") # [("ETH-USD", "Ethereum USD"), ("ETC-USD", "Ethereum Classic USD")]
+get_symbols_by_name("doge")     # [("DOGE-USD", "Dogecoin USD")]
+```
+
+**Use Cases:**
+- Convert user-friendly names to symbols
+- Handle ambiguous input (multiple matches)
+- Discover cryptocurrencies by partial name
+
+## Workflow Patterns
+
+### Pattern 1: Symbol Validation
+```python
+matches = get_symbols_by_name(user_query)
+if not matches:
+    return "Cryptocurrency not found"
+elif len(matches) == 1:
+    symbol, name = matches[0]
+    # Use with market API
+else:
+    # Multiple matches - ask user to clarify
+    return f"Multiple matches: {[name for _, name in matches]}"
+```
+
+### Pattern 2: Batch Resolution
+```python
+names = ["Bitcoin", "Ethereum", "UnknownCoin"]
+resolved = []
+failed = []
+for name in names:
+    matches = get_symbols_by_name(name.lower())
+    if matches:
+        resolved.append(matches[0][0])
+    else:
+        failed.append(name)
+# Use resolved with market_tool.get_products(resolved)
+```
+
+## Integration with Market Tools
+1. User provides name (e.g., "Bitcoin")
+2. Search: `get_symbols_by_name("bitcoin")` → `("BTC-USD", "Bitcoin USD")`
+3. Fetch price: `market_tool.get_product("BTC-USD")`
+4. Return result
+
+## Symbol Format
+- Yahoo Finance format: `BTC-USD`, `ETH-USD` (includes `-USD` suffix)
+- Some APIs need base only: strip suffix with `symbol.split('-')[0]` → `"BTC"`
+
+## Common Mappings
+Bitcoin→BTC-USD | Ethereum→ETH-USD | Solana→SOL-USD | Cardano→ADA-USD | Dogecoin→DOGE-USD
+
+## Critical Rules
+1. Always search before using names - never assume direct conversion
+2. Handle multiple matches (e.g., "Bitcoin" matches BTC and BCH)
+3. Case-insensitive: always use `.lower()` for queries
+4. Check empty results before accessing
+5. Remember `-USD` suffix in Yahoo symbols
+
+## Search Best Practices
+- ✅ Full names: "ethereum", "bitcoin", "solana"
+- ✅ Partial OK: "doge" finds "Dogecoin"
+- ❌ Avoid: ticker symbols ("BTC"), too generic ("coin")
+
+## Cache Notes
+- Cache file: `resources/cryptos.csv` (~1,500+ symbols)
+- No API calls during queries (instant response)
+- Loaded automatically on initialization
+- Static snapshot, not real-time
+
+## Error Handling
+- Empty cache → Ensure `resources/cryptos.csv` exists
+- No results → Try broader terms, check spelling
+- Multiple matches → Show all, ask user to clarify
+- Symbol format mismatch → Strip `-USD` suffix if needed