Add `--silence` Option for Suppressing Logs

[evgenyigumnov]

Implement an optional parameter --silence for the CBLT web server. When this flag is specified, the server should suppress INFO and ERROR level logs on stdout. This will be helpful for users who want a quieter output, especially when running the server in specific environments or scripts where log noise needs to be minimized.

Acceptance Criteria:

• The --silence option can be passed at startup.
• If --silence is present, INFO and ERROR logs should not be printed to stdout.
• Without the --silence flag, the server should behave as it does currently, with INFO and ERROR logs appearing on stdout.
• Ensure that other logging mechanisms (like file logging) are unaffected by this flag.

[LYZJU2019]

Let me give it a try :-)

[evgenyigumnov]

for testing launch:

cargo run --release