[Keyboard] add bt66tech60 handwired (#10867)

* Add files via upload

add handwired bt66tech keyboard

* Update info.json

* Update rules.mk

* Update info.json

* Update config.h

change #define DESCRIPTION

* Update bt66tech60.c

remove #include "bt66tech.h"

* Update config.h

remove #define DESCRIPTION A handwired 60% keyboard.

* Update keymap.c

remove \ and 
// Defines the keycodes used by our macros in process_record_user
enum custom_keycodes {
    QMKBEST = SAFE_RANGE,
    QMKURL
};

* Update readme.md

fill description

* Update rules.mk

apply suggestion

* Update keymap.c

remove bool process_record_user(uint16_t keycode, keyrecord_t *record) .....

* Update keymap.c

remove enter inline 25

* Update readme.md

remove *

* Update bt66tech60.c

remove all and add #include "bt66tech60.h"

* Update keymap.c

* Update rules.mk

remove enter

* Update info.json

chenge LAYOUT to LAYOUT_60_ansi

* Update readme.md

* Update rules.mk

add LAYOUTS = 60_ansi

* Update rules.mk

when add LAYOUTS = 60_ansi the pullrequest check say error so i'm remove it

* Update rules.mk

add LAYOUTS = 60_ansi

* Update rules.mk

1 files changed, 19 insertions, 0 deletions

diff --git a/keyboards/bt66tech/bt66tech60/readme.md b/keyboards/bt66tech/bt66tech60/readme.md
new file mode 100644
index 0000000000..51755c5c91
--- /dev/null
+++ b/keyboards/bt66tech/bt66tech60/readme.md
@@ -0,0 +1,19 @@
+# bt66tech60
+
+![bt66tech60](https://i.imgur.com/8eJ4liU.jpg)
+
+* A handwired 60% keyboard with stm32
+
+* Keyboard Maintainer: [bt66](https://github.com/bt66)
+* Hardware Supported: handwired, STM32
+* Hardware Availability: anywhere
+
+Make example for this keyboard (after setting up your build environment):
+
+    make bt66tech:default
+
+Flashing example for this keyboard:
+
+    make bt66tech: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).