Create publishing action

[ChrisChinchilla]

I started by addressing #28 and then digging in their docs realised we could publish new versions to both marketplaces with one action. But I appear to have lost some access levels @jdkato and can't create the required secrets needed in this action, or I can share the openvsx one with you…

[jdkato]

I think you have full access to this repo, but it seems that the action requires a token generated from dev.azure.com? If so, I think I'll have to generate that.

[ChrisChinchilla]

@jdkato I do not. If I look at one of my own repos, I can go to settings and create repo-level secrets (which is what we need for the action), but not in this repo. GH permissions are really irritating, I likely need admin access if I don't have that already. If I do, it must be an org level thing, and I'll have to get you to do it instead.

[jdkato]

I made you an admin. The GitHub UI says that you only gain the ability to add collaborators, but let me know if it worked.

[ChrisChinchilla]

@jdkato I can confirm I now have access to that section, so will get back to this PR asap.

[ChrisChinchilla]

OK @jdkato I have added a secret for the Open VSX part, following the steps here - https://github.com/HaaLeo/publish-vscode-extension#readme

This should work, once my submission to claim ownership of the 'errata-ai' publisher name is approved for both of us.

For the official VSC store, I think you will need to follow the instructions here - https://github.com/HaaLeo/publish-vscode-extension#visual-studio-marketplace as I do not know what your PAT is for the store, but if you add it as a secret to this repo, that should work fine, I think, we'll see on next merge to master with a new tag.

[ChrisChinchilla]

@jdkato our namespace is approved, so this also means that the open vex part should now work automatically - EclipseFdn/open-vsx.org#275 (comment)

[jdkato]

Thanks for setting this up.

I added the VS_MARKETPLACE_TOKEN, so this is ready to merge?

[ChrisChinchilla]

@jdkato I think so, we won't really know if it has worked until the next tag really.