Support globs in source patterns

[riverwoodland]

With some directory structures it becomes cumbersome to define all the source patterns required. This is particularly problematic with large projects. Having support for globs would help a lot to deal with these scenarios.

On a side note the extension https://github.com/ryzngard/header-source-switch does a very good job in automatically detecting the corresponding header/source file. Could be a nice approach for the future.

[amir9480]

@riverwoodland
I still waiting for the "create implementation" feature in the official C++ extension.

microsoft/vscode-cpptools#664

I can't work on this but contributions are welcome.