Add queue.len() keyboard (#24823)

Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/dotlen/queue/readme.md

@@ -0,0 +1,28 @@
+# Queue.len()
+
+![Queue.len()](https://i.imgur.com/8JKbm6P.png)
+
+A 65% keyboard with multiple layout support.
+
+* Keyboard Maintainer: [Lental](https://github.com/lental)
+* Hardware Supported: Custom PCB
+* Hardware Availability: Private Group Buy
+* Keyboard Layout Editor [Link](https://www.keyboard-layout-editor.com/#/gists/d54fc38f606ce3e990a88044e9b71858)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make dotlen/queue:default
+
+Flashing example for this keyboard:
+
+    make dotlen/queue:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available