improves block functionality

adds cli compatible prompts/logs
adds logfile function for debug
adds multiselect support
new fieldRename
adds listFieldNames

cli/cursor.ts

@@ -0,0 +1,29 @@
+export class Cursor {
+  private static visible = true;
+
+  static show() {
+    this.visible = true;
+    Deno.stdout.writeSync(new TextEncoder().encode("\x1b[?25h"));
+  }
+
+  static hide() {
+    this.visible = false;
+    Deno.stdout.writeSync(new TextEncoder().encode("\x1b[?25l"));
+  }
+
+  static restoreVisibility() {
+    if (this.visible) {
+      this.show();
+    } else {
+      this.hide();
+    }
+  }
+
+  static savePosition() {
+    Deno.stdout.writeSync(new TextEncoder().encode("\x1b7"));
+  }
+
+  static restorePosition() {
+    Deno.stdout.writeSync(new TextEncoder().encode("\x1b8"));
+  }
+}