docs: Move WEB CTE temp tables test to examples with ABS demo

Moved integration test to examples/ and enhanced with ABS function demonstration.

Example now shows:
1. Fetch data from Flask API into temp table
2. Basic statistics (COUNT, MIN, MAX, SUM)
3. GROUP BY with aggregations
4. Computed columns with ABS() function
5. ORDER BY using computed column alias

Key features demonstrated:
- WEB CTE with temp table creation (INTO clause)
- Dependency-aware execution with --execute-statement
- ABS() function for absolute values
- ORDER BY with column alias (workaround for expression limitation)

Usage:
  # Run all statements
  ./target/release/sql-cli -f examples/cte_flask_dependency.sql

  # Run specific statement with dependencies
  ./target/release/sql-cli -f examples/cte_flask_dependency.sql --execute-statement 4

  # In Neovim: \sq (all) or \sx (statement at cursor)

Note: ORDER BY doesn't support expressions directly, but you can use
computed column aliases: SELECT expr as alias ... ORDER BY alias

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

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

Author: TimelordUK

…ation_tests/test_web_cte_temp_tables.sql examples/cte_flask_dependency.sqlintegration_tests/test_web_cte_temp_tables.sql renamed to examples/cte_flask_dependency.sql integration_tests/test_web_cte_temp_tables.sql renamed to examples/cte_flask_dependency.sql

@@ -44,14 +44,16 @@ ORDER BY trade_count DESC
 LIMIT 10;
 GO
 
--- Stage 4: Find largest trades by quantity
+-- Stage 4: Calculate absolute notional values and find largest
 SELECT
     Source,
     BloomberTicker,
     BuySell,
     SignedQuantity,
-    Price
+    Price,
+    (SignedQuantity * Price) as notional_value,
+    ABS(SignedQuantity * Price) as abs_notional
 FROM #bloomberg_trades
-ORDER BY SignedQuantity DESC
-LIMIT 5;
+ORDER BY abs_notional DESC
+LIMIT 10;
 GO