LSP server binary

**Is your feature request related to a problem? Please describe.**

Currently no binary of LSP server is available for Q# and the language service is limited to the Q# playground and vscode with extension. A LSP server binary can be useful for vim users and others.

**Describe the solution you'd like**

Implement a LSP server based on the existing `qsls` crate.

**Describe alternatives you've considered**

None

**Additional context**

None

Start by locating the existing `qsls` crate and understanding how its language service is currently launched. Define the binary entry point and verify that it can serve the Q# Language Server Protocol for external clients such as Vim. Done means a usable LSP server binary is available beyond the playground and VS Code extension.

Written by the indexing model from the issue text.