[FEATURE] Support IPv6 addresses

Is your feature request related to a problem?

$ opensearchsql fe80::df26:c460:e530:123b:9200
Traceback (most recent call last):
  File "/home/yuryf/.local/bin/opensearchsql", line 11, in <module>
    load_entry_point('opensearchsql', 'console_scripts', 'opensearchsql')()
  File "/home/yuryf/.local/lib/python3.8/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/home/yuryf/.local/lib/python3.8/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/home/yuryf/.local/lib/python3.8/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/yuryf/.local/lib/python3.8/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/mnt/c/GitHub/sql-cli/src/opensearch_sql_cli/main.py", line 129, in cli
    opensearchsql_cli.connect(endpoint, http_auth)
  File "/mnt/c/GitHub/sql-cli/src/opensearch_sql_cli/opensearchsql_cli.py", line 176, in connect
    self.opensearch_executor.set_connection()
  File "/mnt/c/GitHub/sql-cli/src/opensearch_sql_cli/opensearch_connection.py", line 110, in set_connection
    opensearch_client = OpenSearch([self.endpoint], verify_certs=True)
  File "/home/yuryf/.local/lib/python3.8/site-packages/opensearchpy/client/__init__.py", line 188, in __init__
    self.transport = transport_class(_normalize_hosts(hosts), **kwargs)
  File "/home/yuryf/.local/lib/python3.8/site-packages/opensearchpy/client/utils.py", line 63, in _normalize_hosts
    if parsed_url.port:
  File "/usr/lib/python3.8/urllib/parse.py", line 177, in port
    raise ValueError(message) from None
ValueError: Port could not be cast to integer value as ':df26:c460:e530:123b:9200'

What solution would you like?
Detect and support IPv6 addresses

What alternatives have you considered?
N/A

Do you have any additional context?
N/A

Start at the CLI entry point in src/opensearch_sql_cli/main.py around line 129, then follow connect in src/opensearch_sql_cli/opensearchsql_cli.py and set_connection in src/opensearch_sql_cli/opensearch_connection.py around line 110. Trace how the endpoint is passed to OpenSearch and ensure IPv6 addresses no longer produce the shown port-parsing error.