Complete redo of content indexing and querying (#517)

Complete redo of data store
Introduces live queries and live templates

plug-api/silverbullet-syscall/handlebars.ts

@@ -0,0 +1,16 @@
+import { syscall } from "$sb/silverbullet-syscall/syscall.ts";
+
+/**
+ * Renders
+ * @param template
+ * @param obj
+ * @param globals
+ * @returns
+ */
+export function renderTemplate(
+  template: string,
+  obj: any,
+  globals: Record<string, any> = {},
+): Promise<string> {
+  return syscall("handlebars.renderTemplate", template, obj, globals);
+}