feat: prepare for parallelizing lsp requests (#342)

* feat: migrate steal_sync to snapshot_sync

* feat: correctly make world/analysis snapshot

* very rayon

* dev: recover async lsp request

* gg

* dev: pin

* fix: make server stable

* dev: disable concurrent server by default

* dev: very sync

crates/tinymist-query/src/symbol.rs

@@ -36,6 +36,8 @@ impl SemanticRequest for SymbolRequest {
 
         let mut symbols = vec![];
 
+        // todo! need compilation for iter_dependencies
+
         ctx.resources.iter_dependencies(&mut |path| {
             let Ok(source) = ctx.source_by_path(&path) else {
                 return;