feat: Add normalized global metrics support

[GordonSmith]

Checklist:

• The commit message is properly formatted and free of typos.
  • The commit message title makes sense in a changelog, by itself.
  • The commit message includes a "fixes" reference if appropriate.
  • The commit is signed.
• The change has been fully tested:
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• There are no similar instances of the same problem that should be addressed
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Testing:

[Copilot]

Pull request overview

This PR adds support for normalized global metrics in the HPCC Communications package by introducing a new method GetNormalisedGlobalMetrics that transforms raw metric data into a standardized format with proper type conversions for cost, date, numeric, and time values.

• Adds GetNormalisedGlobalMetrics method to SMCService class that normalizes metric data from the WsSMC service
• Creates helper method parseGlobalMetric to convert metric values based on field name prefixes
• Updates HTML test page to demonstrate the new functionality with two examples

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

File	Description
packages/comms/src/services/wsSMC.ts	Adds NormalisedGlobalMetric interface, parseGlobalMetric helper method, and GetNormalisedGlobalMetrics method to transform and normalize global metrics data
packages/comms/tests/index.ts	Adds test function to analyze WUDetailsMeta field name prefixes for understanding metric naming patterns
packages/comms/index.html	Updates HTML test page with two test sections: one for WUDetailsMeta prefix analysis and one for demonstrating normalized global metrics retrieval

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