Package the CLAP VST3 wrapper (TBD) as a Windows and Mac tool

[baconpaul]

The clap vst3 wrapper generates a vst3 which is in some sense better than the JUCE one, but it has a different VST3 ID and so on I think, so its not a drop in replacement.

It would be great if we had this distributable though, probably as an extra signed download which we can then point people to in the documentation

So I think the right thing to do is

1. make a new repo called surge-xt-wrapper
2. That contains a cmake file which does the magic (CPM checkout the wrapper, build it, sign it, etc...)
3. And an azure pipeline file that runs it into a release which we can prod at our leisure

then modify the manual to point people at it.

[baconpaul]

So as note to self

 JuceVST3Component::iid.toString(iids);
        std::cout << iids << std::endl;

for surge xt prints

with the algo

DECLARE_CLASS_IID (JuceVST3Component, 0xABCDEF01, 0x9182FAEB, JucePlugin_ManufacturerCode, JucePlugin_PluginCode)

where ManufacturerCode is VmbA and plugin code is SgXT

ABCDEF019182FAEB566D624153675854

[baconpaul]

I'm going to bump this out of 1.3. As conduit progresses maybe we will make it a side download as a test case, or do a 1.4 if it matures and so on, but not gonna change the VST3 architecture for 1.3 at this late stage.