WNMGDS-3037 Adds script to compute percentage of nightly tests that pass

[tamara-corbalt]

Summary

This script analyzes jenkins nightly build data to compute a general pass rate and outputs a list of failed builds for manual inspection.
Note: Includes a placeholder fetchBuildData function. Currently we're mocking the output for testing.

// Sample output for a range of builds
% npx ts-node get-nightly-build-pass-rate.ts 100 5  
Analyzing builds from 96 to 100...
Pass Count: 3
Fail Count: 2
Pass-to-Fail Rate: 60.00%
Failed Builds: 97, 99

// Sample output for a single build:
% npx ts-node get-nightly-build-pass-rate.ts 101 1
Build #101: Fail

Jira ticket

How to test

• Pull down the branch
• Navigate to scripts directory:cd scripts
• Run npx ts-node get-nightly-build-pass-rate.ts <build number> <numberOfDays>
  • Replace with the latest jenkins build number you want to inspect.
  • Replace with the range of days to analyze (optional; defaults to 1 if omitted).

Checklist

• Prefixed the PR title with the Jira ticket number as [WNMGDS-####] Title or [NO-TICKET] if this is unticketed work.
• Selected appropriate Type (only one) label for this PR, if it is a breaking change, label should only be Type: Breaking
• Selected appropriate Impacts, multiple can be selected.
• Selected appropriate release milestone