tools/nxstyle: require braces around control statement bodies

[raiden00pl]

Summary

The standard requires braces after 'if', 'else', 'while', 'for' and 'do' even when the body is a single statement. Nothing checked this.

First commit from #19555

There are many violations of this rule upstream, none of them are fixed in this PR

Impact

missing coding style check in nxstyle

Testing

before this change, lines like below was accepted:

 43   if (1) continue;
 44 
 45   while (1) continue;
 46 
 47   if (1)
 48     continue;
 49 
 50   while (1)
 51     continue;
 52 

with this change nxstyle return errors:

/home/raiden00/git/RTOS/nuttx/nuttx-nxstyle-fixes/test.c:43:9: error: Statement on same line as 'if'
/home/raiden00/git/RTOS/nuttx/nuttx-nxstyle-fixes/test.c:45:12: error: Statement on same line as 'while'
/home/raiden00/git/RTOS/nuttx/nuttx-nxstyle-fixes/test.c:48:4: error: Missing braces after 'if'
/home/raiden00/git/RTOS/nuttx/nuttx-nxstyle-fixes/test.c:51:4: error: Missing braces after 'while'

[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• arduino-mega2560
• esp32-devkitc
• hifive1-revb
• mirtoo
• qemu-armv8a
• qemu-intel64
• rx65n-rsk2mb
• s698pm-dkit
• stm32-nucleo-f103rb