Add Accounting Items Management and SQL Integration

- Introduced AccountingItemsManager component for managing accounting entries within transactions.
- Implemented API routes for creating, retrieving, updating, and deleting accounting items.
- Added SQL queries to handle accounting items linked to transactions, supporting both numeric and string transaction IDs.
- Enhanced CSV import functionality to include new accounting item handling.
- Created mssql.md documentation for SQL command usage related to accounting items.

.kilocode/rules/mssql.md

@@ -0,0 +1,4 @@
+# mssql.md
+
+sqlcmd -C -S tcp:192.168.56.1,1497 -U app -P 'readonly' -d eazybusiness -W
+