Fix: RedisVL breaks existing logging configurations

[bsbodden]

Fix: Prevent RedisVL from overriding existing logging configurations

Issue

When importing any RedisVL component, the library currently overrides existing user-defined logging configurations silently. This happens because coloredlogs.install() is called during module import in redisvl/utils/log.py, which affects the root logger without the user's knowledge or consent.

Changes

• Modified the get_logger function in log.py to respect existing logging configurations
• Added reconfigure=False to prevent modifying existing loggers
• Added isatty=True to only use colors in supported terminals
• Added a check to only configure loggers that don't already have handlers

Testing

Replicates the before RedisVL is loaded scenario by using an external (to the test) py file that's run on it's own process

Fixes #293

[rbs333]

LGTM