chore: vendor swabble and add speech usage strings

Swabble/Sources/swabble/Commands/TailLogCommand.swift

@@ -0,0 +1,20 @@
+import Commander
+import Foundation
+import Swabble
+
+@MainActor
+struct TailLogCommand: ParsableCommand {
+    static var commandDescription: CommandDescription {
+        CommandDescription(commandName: "tail-log", abstract: "Tail recent transcripts")
+    }
+
+    init() {}
+    init(parsed: ParsedValues) {}
+
+    mutating func run() async throws {
+        let latest = await TranscriptsStore.shared.latest()
+        for line in latest.suffix(10) {
+            print(line)
+        }
+    }
+}