cmd/forwarder/run: register process metrics

[mmatczuk]

Since we are using a custom registry we need to add Go and process stats. Unfortunately the process data is only available in Linux and Windows.

[what-the-diff]

PR Summary

• Addition of Import Paths
  New code libraries have been included for use in our forwarder implementation. This would open up more features and functionalities that we can utilize in the software.

• New Function registerProcMetrics
  A new operation called registerProcMetrics has been introduced. This function adds new capabilities to monitor and collect data on the software's performance.

• Upgrade to runE function
  The existing operation called runE has undergone a revision to incorporate the newly added registerProcMetrics function. This allows the existing function to have extended functionalities drawn from the new operation; notably in inspecting performance metrics.

• No change to Command function
  The Command function remains unchanged and continues to serve its original purpose in the software.

[mmatczuk]

cc @amckenzie132