Add OFX 1.6 host and parameter layout properties

[fxtech]

Adds the Nuke OFX extension properties that have no current analogue:

• kOfxParamPropLayoutHint
• kOfxParamPropLayoutPadWidth
• kOfxPropHostProductTitle
• kOfxPropHostMajorVersion
• kOfxPropHostMinorVersion
• kOfxPropHostBuildVersion
• kOfxParamPropGroupIsTab

Notes:

• kOfxPropOverlayColour already had an existing equivalent: kOfxInteractPropSuggestedColour
• kOfxParamPropHidden already had an existing equivalent: kOfxParamPropSecret

This PR implements the original PR #41

[revisionfx]

There is already a multi-dimensional property for host version - as well as host product name
Host Version Propertiesk
OfxPropVersion: Integer array property containing numeric version dimensions (major, minor, micro, etc.).
kOfxPropVersionLabel: String property providing a user-readable version string.kOfxPropName / kOfxPropLabel: Strings to identify the unique name or visible label of the host application.
kOfxPropAPIVersion: Integer array property for the OpenFX API version implemented by the host

[fxtech]

Well-observed @revisionfx !
Sounds like we already have everything in place except maybe BuildVersion and the parameter properties - and those are kind of Nuke-specific. I could see maybe supporting one or two of them but as a general property - I don't know.

Thoughts/comments?

[revisionfx]

You can do build number using 4D, already a host at least doing that: e.g. 2026.5.0.34

[fxtech]

You can do build number using 4D, already a host at least doing that: e.g. 2026.5.0.34

You're right! I was thinking of commit hash.
That leaves us with only the parameter layout hints.

[garyo]

OK, that's great. The layout hints are: OfxParamPropGroupIsTab (seems like a nice idea, but there are some semantics to work out here: successive groups with this prop become a tab group I guess?), and OfxParamPropLayoutHint:

For LayoutHint (an enum, right?) the values in the original header are:

//   lay out as normal
#define kOfxParamPropLayoutHintNormal 0

//   put a divider after parameter
#define kOfxParamPropLayoutHintDivider 1

//   have the next parameter start on the same line as this
#define kOfxParamPropLayoutHintNoNewLine 2

I can definitely imagine wanting to use both of these in some cases. Then OfxParamPropLayoutPadWidth specifies the plugin's desired horizontal space between this one and the next in the NoNewLine case above — that padding width I'm less sure of, because it seems pretty host- and screen-size-specific (never mind HiDPI).

So can we get agreement from any host to implement these two?

[revisionfx]

For kOfxParamPropGroupIsTab - would be what an app like Fusion needs, we have Page parameters. But tab is a distinct UI thing. For example in Fusion native we use Tab thing equivalent.