Unifiy usage of verbose/silent flag

Some of our analysers feature a flag to show more information during analysis. However, some analysers call this flag `--verbose` and others call it `--silent`.

As these flags serve the same purpose, we should decide on one to use to improve usability and reduce confusion

Start by locating the analyzer flag definitions and comparing how --verbose and --silent behave across analyzers. Confirm with maintainers which name should be retained, then update the affected analyzer entry points and verify that their help output uses one consistent convention.

Written by the indexing model from the issue text.