feat: move core to tui and begin grpc work

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

crates/hyperlog-server/src/querier.rs

@@ -0,0 +1,33 @@
+use hyperlog_core::log::GraphItem;
+
+use crate::state::SharedState;
+
+pub struct Querier {}
+
+impl Querier {
+    pub fn new() -> Self {
+        Self {}
+    }
+
+    pub fn get_available_roots(&self) -> Option<Vec<String>> {
+        todo!()
+    }
+
+    pub fn get(
+        &self,
+        root: &str,
+        path: impl IntoIterator<Item = impl Into<String>>,
+    ) -> Option<GraphItem> {
+        todo!()
+    }
+}
+
+pub trait QuerierExt {
+    fn querier(&self) -> Querier;
+}
+
+impl QuerierExt for SharedState {
+    fn querier(&self) -> Querier {
+        Querier::new()
+    }
+}