Anonymous opt-in telemetry

[SuperAuguste]

Roadmap

• [x] Add a zls.optInTelemetry option
• [x] Implement client for OTEL middleman in Zig
• [x] Host some sort of telemetry server

Metrics

• [x] Starts/stops w/ Zig/ZLS version, editor version, OS
• [x] Req/res kinds and times
• [ ] Analysis times vs. file size
• [ ] Errors and crashes

I know telemetry can be controversial in the OSS space but I feel that opt-in telemetry could help us substantially improve zls by targeting un(der)reported issues.