remove AVR folder

this branch will be for STM8L MCU only
remove STM8S peripheral device driver
add STM8L standard peripheral drivers V1.6.0
remove STM8S related files

remove files: IAR project files, STM8 int vectors, STM8S conf file and
old main.c
fix IAR comile error

change section .text to .near_func.text
add .gitignore file

filter useless files
remove useless header file
Update IAR project files

.ewd .ewp
add StdPeriph conf file and int vector file
modify #include "xx" to #include <xx>
interrupt vector has a dedicated file

remove unless lines
use UART1

STM8L151K4T6 only as USART1
Atomthreads tick timer adapts to STM8L StdPeriph
rewrite main thread
remove compile related file from folder STM8

they will be relocated
create a new folder EWSTM8 for compile IAR
create a new folder for STVD/Cosmic compiler
create a new folder for compile STVD/raisonance