* initial gpio layer
* move temlplate.c to template.c.example in preparing to applications.mk rework
* separate arduino layer
* separate flipper_hal.x
* prepare to switch applications on v2 core gpio api
* swithch applications to v2 gpio api
* gpio api for local target
* better gpio_disable handling
* remove pwm functions from local target
* inline gpio funcs
* common function to init all api's
* fix local example blink
* move delay us to hal api folder
* move pwm_set/pwm_stop to hal api folder
* update applications to use hal pwm api
* remove gpio mode case warning
* add speaker demo to build
Co-authored-by: DrZlo13 <who.just.the.doctor@gmail.com>
