feat: move core to tui and begin grpc work

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/hyperlog-tui/src/querier.rs

@@ -0,0 +1,39 @@
+use hyperlog_core::log::GraphItem;
+
+use crate::shared_engine::SharedEngine;
+
+pub struct Querier {
+    engine: SharedEngine,
+}
+
+impl Querier {
+    pub fn new(engine: SharedEngine) -> Self {
+        Self { engine }
+    }
+
+    pub fn get_available_roots(&self) -> Option<Vec<String>> {
+        self.engine.get_roots()
+    }
+
+    pub fn get(
+        &self,
+        root: &str,
+        path: impl IntoIterator<Item = impl Into<String>>,
+    ) -> Option<GraphItem> {
+        let path = path
+            .into_iter()
+            .map(|i| i.into())
+            .filter(|i| !i.is_empty())
+            .collect::<Vec<String>>();
+
+        tracing::debug!(
+            "quering: root:({}), path:({}), len: ({}))",
+            root,
+            path.join("."),
+            path.len()
+        );
+
+        self.engine
+            .get(root, &path.iter().map(|i| i.as_str()).collect::<Vec<_>>())
+    }
+}