Pre-emptive token refresh mechanism

[saimanikant]

Description

Addressing #810

Checklist

• I have tested these changes locally.
• I have added unit tests (if appropriate).
• I have added necessary documentation or updated existing documentation.
• I have linked the issue(s) addressed by this PR if any.

[codecov]

Codecov Report

❌ Patch coverage is 79.56989% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.04%. Comparing base (4a527fd) to head (6badaec).

Files with missing lines	Patch %	Lines
src/ansys/hps/client/client.py	79.56%	19 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #811   +/-   ##
=======================================
  Coverage   86.04%   86.04%           
=======================================
  Files          71       71           
  Lines        3247     3247           
=======================================
  Hits         2794     2794           
  Misses        453      453           

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