Ignore .github/ and .gitignore from packaging

[fbricon]

Signed-off-by: Fred Bricon [email protected]

[rgrunber]

This is fine to me. I don't see any files under .github/ or .gitignore itself end up in the vsix when i package it though. Is it a platform specific issue or just for the sake of clarity that you have them there.

[Eskibear]

LGTM to explicit exclude them.
git related folders might already be excluded by default when packaging using vsce. But I still see .sdkmanrc there, which is not needed.

[Eskibear]

I don't see any files under .github/ or .gitignore itself

See https://github.com/microsoft/vscode-vsce/blob/main/src/package.ts#L1489-L1523

[fbricon]

made the PR because I saw we had that issue in vscode-xml : redhat-developer/vscode-xml#891

doesn't hurt in any case