typescript: Pass `hostInfo` to `tsserver` (#12055)

- Added `hostInfo` property to zed's typescript plugin. This can be
useful for telemetry (for e.g. identifying the usage of editors based on
typescript usage) when building typescript plugins.

- VSCode / IntelliJ based editors already set this property
([see](https://github.com/microsoft/vscode/blob/aa31bfc9fd1746626b3efe86f41b9c172d5f4d23/extensions/typescript-language-features/src/typescriptServiceClient.ts#L574))

The config option as available —
https://github.com/typescript-language-server/typescript-language-server/blob/master/docs/configuration.md#initializationoptions

Release Notes:

- N/A