96bbddb186
- Tracked `$/progress` begin/end notifications to keep active work-done progress tokens. - Added `projectLoaded` signaling with timeout fallback while awaiting initial project load completion. - Blocked cross-file LSP actions until project load finished to avoid premature file-index lookups. - Handled `window/workDoneProgress/create` requests by acknowledging them for progress-capable servers. - Extended `LspClient` with `activeProgressTokens`, `projectLoaded`, and `resolveProjectLoaded` for startup sync. - Updated LSP regression and diagnostics tests to initialize new `LspClient` state fields.