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>

crates/db-app/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "db-app"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+publish = false
+
+[dependencies]
+db-config.workspace = true
+db-core.workspace = true
+db-drivers.workspace = true
+serde = { version = "1.0.228", features = ["derive"] }
+
+[dev-dependencies]
+rusqlite.workspace = true
+serde_json = "1.0.145"
+
+[lints]
+workspace = true