Support configuring TS watchFileOptions

[mjbvz]

Tracks support for configuring the new TS watch options at the server level

[mjbvz]

To verify:

1. Enable TS Server logging
2. Try configuring the new options (note that we intentionally want users to edit the settings.json instead of using our settings editor here since this is an advanced setting)
3. Open a TS file
4. Change a watch option
5. Run the TypeScript: Open ts server logs command

In the logs, confirm that your watch options have been applied. There should be lines that look like:

    {"seq":0,"type":"request","command":"configure","arguments":{"hostInfo":"vscode","preferences":{"providePrefixAndSuffixTextForRename":true,"allowRenameOfImportPath":true},"watchOptions":{"watchFile":"useFsEvents"}}}
Info 6    [14:45:52.89] Host information vscode
Info 7    [14:45:52.90] Host watch options changed to {"watchFile":3}, it will be take effect for next watches.