[SingularVector]

Summary

Finalize IT-ToolBox 3.0.0 by aligning the README, manifest, release notes and timer implementations. This closes the gap left by the earlier timer PR, which added regression tests without the corresponding production fixes.

Scope

• Update manifest attribution to SingularVector and clarify the module description.
• Document all 29 exported functions and their platform requirements.
• Apply the missing Stop-Timer and Get-TimerStatus validation and diagnostic fixes.
• Consolidate completed work into the 3.0.0 changelog and update packaging instructions.
• Add checks to keep documented commands, public functions and exports aligned.

The module GUID, 29-function API and PowerShell 7.4+ requirement remain unchanged. Null timer arguments now raise parameter-binding errors; valid timer calls retain their existing behavior.

Validation

• Pester tests run — 358 passed, 0 failed, 5 skipped on macOS
• Module imports successfully — including extracted archive validation
• Documentation updated where needed
• No unrelated files changed

Notes

The module archive builds successfully. Windows and Linux validation runs through CI. Live AD, remote CIM and service authentication remain outside the tested integration scope.

This PR finalizes repository content for 3.0.0; it does not create a release tag or publish the module.