[Keyboard] Add "Center x Enter" (#14790)

Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/takashicompany/center_enter/readme.md

@@ -0,0 +1,29 @@
+# Center x Enter
+
+![image](https://raw.githubusercontent.com/takashicompany/center-enter/master/images/qmk.jpg)
+
+A 30% keyboard with the enter key placed in the center.
+Option to install a rotary encoder is also available.
+VIA (Remap) is also supported.
+
+* Keyboard Maintainer: [takashicompany](https://github.com/takashicompany)
+* Hardware Supported: Center x Enter PCB, Pro Micro
+* Hardware Availability: https://github.com/takashicompany/center-enter
+
+Make example for this keyboard (after setting up your build environment):
+
+    make takashicompany/center_enter:default
+
+Flashing example for this keyboard:
+
+    make takashicompany/center_enter: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 `RESET` if it is available