uefi-raw: Add bindings for most HII protocols

[crawfxrd]

Add bindings for the following protocols:

• HiiFont (EFI_HII_FONT_PROTOCOL)
• HiiFontEx (EFI_HII_FONT_EX_PROTOCOL)
• HiiString (EFI_HII_STRING_PROTOCOL)
• HiiImage (EFI_HII_IMAGE_PROTOCOL)
• HiiImageEx (EFI_HII_IMAGE_EX_PROTOCOL)
• HiiPopup (EFI_HII_POPUP_PROTOCOL)
• FormBrowser2 (EFI_FORM_BROWSER2_PROTOCOL)

Ref: UEFI 2.11: 34 HII Protocols
Ref: UEFI 2.11: 35 HII Configuration Processing and Browser Protocol

TODO

• Determine correct implementation and use of anonymous union in ImageOutput
• Add glyph-related data types to complete HiiFontExProtocol.get_glyph_info
• Add HII package definitions for database integration (Section 33.3)?
  • Will add IFR related stuff in a follow up, since it looks like a lot.

Checklist

• Sensible git history (for example, squash "typo" or "fix" commits). See the Rewriting History guide for help.
• Update the changelog (if necessary)

[crawfxrd]

I've added the Form Browser and Popup protocols for completion, since I know I'll need the form browser.

All HII protocols should now have bindings, except:

• EFI_HII_IMAGE_DECODER_PROTOCOL: Seems very niche; unlikely to be used.
• EFI_HII_FONT_GLYPH_GENERATOR_PROTOCOL: Not even implemented in edk2.

[phip1611]

LGTM! Can you point me to any higher-level real world usage of these protocols? Would love to see a real-world demo

[crawfxrd]

System76 has several UEFI modules currently using redox_uefi that I am planning to switch to uefi-rs.

In this case of HII, we replace edk2's Form Display Engine (FDE) Protocol (DisplayEngineDxe) to implement a custom UI for our firmware.

(Examples of what the UI looks like can be seen in e.g.: system76/firmware-setup#53)

The Internal Forms Representation (IFR) bindings still need to be added in a follow up for actually processing forms data for rendering.

And the actual declaration of the forms themselves is still done from edk2 modules using its Visual Forms Representation (VFR) language.

[phip1611]

For some reasons I can't edit your branch although the checkmark is set by you. Please rebase