Adopt to new `include` option in `IFileService.watch`

IFileService.watch method now supports a new include option that works like exclude but negated: only register to events that match a glob pattern. It doesnt really help for cases where you watch a folder and want to track for any change within, only when you watch a folder where you know other files are in that might change that you do not care about.

[bpasero]

Hm, maybe we should rather allow for IRelativePattern in the watch API because that solves the issue of combining a glob pattern with a path. We introduced that specifically to avoid having to join paths with patterns because you never know which format to use. I can look into that.

https://github.com/microsoft/vscode/blob/5a36ebebb9dbfb0967bc58f986752f316567fcb0/src/vs/base/common/glob.ts#L14-L29

[bpasero]

Pushed https://github.com/microsoft/vscode/commit/e6d98a13fcd3bf928d0e755eaae873ac200a98bd to allow for relative pattern in include. This should be possible now:

const userSettingsFolder = extUri.dirname(this.userSettingsResource);
this._register(this.fileService.watch(userSettingsFolder, { includes: [{ base: userSettingsFolder.fsPath, pattern: basename(this.userSettingsResource) }], excludes: [], recursive: false }));

Still requires the fix for https://github.com/microsoft/vscode/issues/147499