restructure: hippocampus/ for memory, subconscious/ for agents

hippocampus/ — memory storage, retrieval, and consolidation:
  store, graph, query, similarity, spectral, neuro, counters,
  config, transcript, memory_search, lookups, cursor, migrate

subconscious/ — autonomous agents that process without being asked:
  reflect, surface, consolidate, digest, audit, etc.

All existing crate::X paths preserved via re-exports in lib.rs.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Cargo.lock

@@ -467,6 +467,7 @@ dependencies = [
  "iana-time-zone",
  "js-sys",
  "num-traits",
+ "serde",
  "wasm-bindgen",
  "windows-link",
 ]
@@ -2758,6 +2759,33 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "poc-agent"
+version = "0.4.0"
+dependencies = [
+ "anyhow",
+ "base64 0.22.1",
+ "chrono",
+ "clap",
+ "crossterm",
+ "dirs",
+ "figment",
+ "futures",
+ "glob",
+ "json5",
+ "libc",
+ "ratatui",
+ "reqwest",
+ "serde",
+ "serde_json",
+ "tiktoken-rs",
+ "tokio",
+ "tui-markdown",
+ "tui-textarea-2",
+ "unicode-width",
+ "walkdir",
+]
+
 [[package]]
 name = "poc-daemon"
 version = "0.4.0"