feat: add dbtool tui live query workspace

- add shared db-app layer for connect/inspect/query/export events
- add dbtool-tui workspace with sqlite-local live flow and QA docs
- include host-validated acceptance updates for CMP-36

Co-Authored-By: Paperclip <noreply@paperclip.ing>

Cargo.toml

@@ -1,6 +1,8 @@
 [workspace]
 members = [
   "apps/cli",
+  "apps/tui",
+  "crates/db-app",
   "crates/db-config",
   "crates/db-core",
   "crates/db-drivers",
@@ -13,6 +15,7 @@ edition = "2021"
 rust-version = "1.82"
 
 [workspace.dependencies]
+db-app = { path = "crates/db-app" }
 db-config = { path = "crates/db-config" }
 db-core = { path = "crates/db-core" }
 db-drivers = { path = "crates/db-drivers" }