add daily scan

[ezhang6811]

Issue #, if available:

Description of changes:
Add daily-scan.yml to detect security vulnerabilities in source code and package-lock.json.

Example run: https://github.com/aws/aws-xray-sdk-node/actions/runs/20931941532

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.31%. Comparing base (40cd819) to head (e87fe65).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #738   +/-   ##
=======================================
  Coverage   84.31%   84.31%           
=======================================
  Files          36       36           
  Lines        1817     1817           
=======================================
  Hits         1532     1532           
  Misses        285      285           

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