feat(zigbee): add Rti-Tek STHZB humidity sensor

[QuAnnan2019]

Type of Change

• WWST Certification Request
  • I have reviewed the README.md file
  • I have reviewed the CODE_OF_CONDUCT.md file
  • I have signed the CLA
  • I plan on entering a WWST Certification Request or have entered a request through the WWST Certification console at developer.smartthings.com
• Bug fix
• New feature
• Refactor

Checklist

• I have performed a self-review of my code
• I have commented my code in hard-to-understand areas
• I have verified my changes by testing with a device or have communicated a plan for testing
• I am adding new behavior, such as adding a sub-driver, and have added and run new unit tests to cover the new behavior

Description of Change

Adds manufacturer fingerprint support for the Rti-Tek STHZB Zigbee temperature and humidity sensor to the existing zigbee-humidity-sensor Edge driver.

The new rtitek-sthzb profile intentionally exposes only SmartThings standard capabilities: temperature measurement, relative humidity measurement, battery, and refresh. It does not expose the device's FD22 private cluster or any custom capabilities.

Summary of Completed Tests

• YAML parse validation for the fingerprint and profile
• CLI edge:drivers:package --build-only package build
• Profile duplicate and category checks
• Added integration coverage for standard temperature, humidity, battery, and refresh messages

The local Lua runtime and lua_libs test dependency are not installed on this workstation, so the new Lua integration test has not yet been executed locally. Real-hub validation and SmartThings Console Test Suite execution remain required before this draft is marked ready for review.

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