[Release] Increase version to 0.15.0

[nev21]

No description provided.

[Copilot]

Pull request overview

This release PR updates the package metadata and release documentation for @nevware21/ts-utils version 0.15.0.

Changes:

• Bumps root and published package versions to 0.15.0.
• Updates README recommended install range to start at 0.15.0.
• Adds a v0.15.0 changelog entry with feature and bug-fix summaries.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
package.json	Updates root package version.
lib/package.json	Updates published package version.
README.md	Updates recommended dependency version range.
CHANGELOG.md	Adds the v0.15.0 release notes and compare link.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.17%. Comparing base (358d5d1) to head (2eab838).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #577   +/-   ##
=======================================
  Coverage   99.17%   99.17%           
=======================================
  Files         179      179           
  Lines        5475     5475           
  Branches     1204     1200    -4     
=======================================
  Hits         5430     5430           
  Misses         45       45           

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[nevware21-bot]

Approved by nevware21-bot