✨ feat(lsp_server): implement missing providers and json coverage

Implement workspace configuration/folders and apply WorkspaceEdit.changes.

Strengthen provider JSON coverage (all methods require params, no errors).

Verified: Release test_provider

lsp-server/src/manager/bootstrap.cppm

@@ -1,7 +1,5 @@
 module;
 
-#include <format>
-
 export module lsp.manager.bootstrap;
 import spdlog;