[LSP] Fix SemanticTokensOptions API

## Problem
`SemanticTokensFullOptions::bool(true)` doesn't exist in lsp-types 0.94.

## Files Affected
- `tools/lsp/src/main.rs` (line 74)

## Fix
Replace:
```rust
full: Some(SemanticTokensFullOptions::bool(true)),
```
With:
```rust
full: Some(SemanticTokensFullOptions {
    ..Default::default()
}),
```

## Priority
High

## Labels
- lsp
- good-first-issue