Exclude all ENV variables with new configuration option

[Rjiegit]

This PR adds a new configuration option to exclude all $_ENV variables from the profiling data.

• New config: 'profiler.is-exclude-all-env' => false (default: false)
• When set to true, all environment variables will be excluded from the result.
• Fixes #79

This helps prevent leaking a large number of secrets or sensitive information into the profiling output.