style: Fix coding style violations in nuttx-apps

Fix various coding style issues including:
- Case statement formatting
- Include placement and ordering
- Whitespace issues
- Long line formatting
- Bracket alignment

Affected modules:
- audioutils, examples, include
- netutils, system

Signed-off-by: Huang Qi <huangqi3@xiaomi.com>

netutils/netlib/netlib_ipv4addrconv.c

@@ -68,9 +68,9 @@ bool netlib_ipv4addrconv(FAR const char *addrstr, FAR uint8_t *ipaddr)
         {
           ch = *addrstr++;
           if (++j > 4)
-           {
-             return false;
-           }
+            {
+              return false;
+            }
 
           if (ch == '.' || ch == 0)
             {