feat: vault core/CLI/workbench, vaultd token path, filetree view-state cleanup

Land password-vault dedicated workbench and mnote-vault-core/CLI, agent token
read path design, vault transport split, and retire obsolete filetree smokes.
Ignore local vault reimport scripts that trip secret scanners.

rust/crates/mnote-vault/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "mnote-vault"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+description = "Local vault CLI: issue-token / list / get / resolve / login / session / serve (no mnote-web)"
+
+[[bin]]
+name = "mnote-vault"
+path = "src/main.rs"
+
+[dependencies]
+clap = { version = "4.5.38", features = ["derive"] }
+mnote-vault-core = { path = "../mnote-vault-core" }
+serde_json = "1"