Describe the solution you'd like
There is currently no dedicated detection for leaked Looker SDK credentials, particularly API3 client_id and client_secret, which are frequently stored in INI-based configuration (looker.ini) or hardcoded in application code and scripts.

A draft PR implementing rules for Looker client_id and client_secret has been prepared and will be linked to this issue.

Additional context
Relevant references here:

• https://github.com/looker-open-source/sdk-codegen#environment-variable-configuration
• https://cloud.google.com/looker/docs/api-sdk

cc @zricethezav