initial dingger: tmux agent watcher with herdr's detection engine

extract detect-core from herdr's src/detect (engine + 22 manifests,
tests unchanged) and add the dingger binary: tmux capture-pane watcher,
process-tree agent identification, herdr's notification policy, embedded
notification sounds, @agent_state write-back, and catalog-based manifest
refresh. viewer screens are non-observations per the engine contract;
reviewed by a three-model panel (opus 5.5, gpt 6.1 sol, kimi k3) with
all confirmed findings applied as deletions.

1 files changed, 14 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..b565ce2
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,14 @@
+[workspace]
+members = ["crates/detect-core", "crates/dinggerd"]
+resolver = "2"
+
+[workspace.package]
+edition = "2021"
+
+[workspace.dependencies]
+regex = "1"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+toml = "0.8"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }