add some dev notes

DEVELOPMENT.md

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+# Developing ARDUX for ZMK
+
+## Work In Progress
+
+The below is a work in progress. Don't be surprised if there are quirks in the information provided below. PRs are welcome.
+
+## Misc Notes
+
+```
+
+KiTTY has an auto reconnect option, but it's not fast enough to catch the first few messages
+ 
+There's a Kconfig setting to delay starting the logging thread.
+ 
+Set it a tad higher, should let you catch first log messages.
+ 
+LOG_PROCESS_THREAD_STARTUP_DELAY_MS is the setting.
+
+```