feature(oem): replicate OEM hybrid pattern for HP

[Gumbees]

Summary

Replicate the OEM hybrid management pattern (landed for Dell in #69) for HP endpoints. Dell is the prototype; HP follows the same shape.

Scope

Add the following under oem-hp/ matching the Dell layout:

oem-hp/
  hp-baseline.ps1                       # orchestrator: detect HP, dispatch leaves
  hp-image-assistant-install.ps1        # idempotent HPIA install
  hp-image-assistant-run.ps1            # HPIA scan + apply
  hp-bios-config.ps1                    # BIOS Configuration Utility (BCU) policy push
  hp-debloat.ps1                        # remove HP consumer software (HP Smart, HP Wolf consumer, etc.)
  lib/hp-detection.ps1                  # Test-HPHardware, Get-HPIAVersion, Test-BCUInstalled, etc.

The shared OEM helpers (oem-shared/lib/oem-manufacturer-detect.ps1) already cover the Get-OEMManufacturer returning "HP" case ... no shared-lib changes required.

Vendor tools

• HP Image Assistant (HPIA) for driver / firmware / softpaq lifecycle. Confirm latest version + silent install command + exit codes against https://ftp.hp.com/pub/caps-softpaq/cmit/HPIA.html.
• HP BIOS Configuration Utility (BCU) for BIOS settings via REPSET file. Confirm install path + /Set:<file> flag against HP's BCU user guide.

Conventions

Match the Dell prototype exactly:

• Target development (default branch).
• $env:VAR for all RMM-supplied variables; compare $env:RMM to "1".
• Three-section structure per script-template-powershell.ps1.
• Start-Transcript / Stop-Transcript with $TranscriptStarted guard (PR Fix Stop-Transcript error when transcript not active #34 pattern).
• Lib bootstrap with SHA256 pinning at @release tag (PR improvement(docs): lib-bootstrap pattern + development branch model + jsDelivr URLs #68 pattern).
• feature/ branch prefix.
• Labels: type:enhancement + category:feature.

Acceptance criteria

• hp-baseline.ps1 exits cleanly on non-HP hardware.
• Each leaf script is independently runnable AND chains correctly from the orchestrator.
• All RMM env vars documented in the top comment block per repo convention.
• Status reported to a Ninja text custom field (hpBaselineStatus default).
• SHA256 placeholders for all jsDelivr URLs with explicit TODO markers to update once the libs/leaves land on @release.
• Manual smoke test on an HP endpoint.

References

• Prototype PR: feature(oem): OEM hybrid management pattern + Dell prototype #69 (Dell)
• Pattern docs: see CLAUDE.md -> "Lib Bootstrap Pattern" (introduced in improvement(docs): lib-bootstrap pattern + development branch model + jsDelivr URLs #68)
• Change Taxonomy