Resolved #107 -- Added support for line & cell magics by subclassing MetaKernel

- Subclassed MetaKernel to implement custom line and cell magic commands
- Updated output methods to follow MetaKernel’s conventions
- Adjusted execution logic to align with MetaKernel's do_execute function

Author: dwijm12

dyalog_kernel/kernel.py

@@ -6,7 +6,6 @@
 import subprocess
 import re
 import html
-import inspect
 
 from collections import deque