Complete redo of content indexing and querying (#517)

Complete redo of data store
Introduces live queries and live templates

web/syscalls/datastore.proxy.ts

@@ -0,0 +1,15 @@
+import type { SysCallMapping } from "../../plugos/system.ts";
+import type { Client } from "../client.ts";
+import { proxySyscalls } from "./util.ts";
+
+export function dataStoreProxySyscalls(client: Client): SysCallMapping {
+  return proxySyscalls(client, [
+    "datastore.delete",
+    "datastore.set",
+    "datastore.batchSet",
+    "datastore.batchDelete",
+    "datastore.batchGet",
+    "datastore.get",
+    "datastore.query",
+  ]);
+}