btstack_run_loop: fix warnings

btstack_run_loop: add log_error and explanation for assert on adding already active timer

btstack_run_loop: support uint64_t timer variable
btstack_run_loop: cleanup whitespaces

license: update text

docs: use @return instead of @returns

btstack_run_loop: add list of callbacks and provide btstack_run_loop_base_execute_callbacks

btstack_run_loop: extend run loop api

btstack_run_loop: fix warnings

MISRAC2012-Rule-8.3_b: match function declaration and definition

btstack_run_loop: fix warning in dump timers

moved btstack_run_loop_base into btstack_run_loop to allow for refactored run loops without client build changes

btstack_run_loop: assert callbacks for timer and data source are set

btstack_run_loop: use assert for not implemented functions

btstack_run_loop: support de-init

btstack_run_loop: use btstack_assert() instead of local version

remove <stdio.h>, <stdlib.h> and printf from most core files

MISRAC2012-Rule-14.4_d: use while(true) instead of while(1)

Use BTSTACK_FILE__ without __ prefix (MISRAC2012-Rule-21.1)

run_loop: avoid anonymous union

btstack_run_loop: add btstack_run_loop_set_data_source_handle and btstack_run_loop_get_data_source_handle (for windows)

tool: add update_filename.py that adds __BTSTACK_FILE__ to every .c file for use with debug output instead of __FILE__

btstack_run_loop: don't return of void function

runloop: pass enable/disable callbacks to run loop impl

runloop: enable callback for all data sources

runloop: add data source callback type to ds handler