add README

keyboards/havit/kb435l/readme.md

@@ -1,3 +1,18 @@
-# Havit KB435L
+# Havit KB435L TKL ISO
 
-ISO, no RGB
+_Havit KB435L TKL ISO_, but rainbow LEDs not supported here.
+
+* Keyboard Maintainer: [humanplayer2](https://github.com/humanplayer2)
+
+**This is an SN32F268 board, so it requires jumploader**
+The generic Sonix bootloader works, but does not support entering the bootloader by presing a key while pluging in. [This pull request](https://github.com/SonixQMK/sonix-keyboard-bootloader/pull/28) provides a jumploader for the board specifically. With it installed, the bootloader may be entered by holding _Escape_ while pluging in the board.
+
+To compile: `qmk compile -kb havit/kb435l/ -km default`
+
+TODO:
+- add ANSI support
+- add LED support
+- add CapsLock indicator LED support
+
+* * *
+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).