Run clang-format and enable CI check for it (#755)

* pre-commit: Update and enable clang-format check

There is newer version from clang-format so use that. We do not yet want
18 as that is little bit too new.

* Format some thing by hand which clang-format "breaks"

Clang-format will format some things little bit off in some cases.
Format some things by hand so we get cleaner end result.

* Run clang-format with

```
pre-commit run --all-files clang-format
```

We have already in previously checked places where clang-format does not
make good format and ignored those (hopefully most of the things).

---------

Co-authored-by: Kari Argillander <kari.argillander@fidelix.com>

src/bacnet/basic/sys/days.c

@@ -37,8 +37,9 @@ uint8_t days_per_month(uint16_t year, uint8_t month)
 {
     /* note: start with a zero in the first element to save us from a
        month - 1 calculation in the lookup */
-    uint8_t month_days[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30,
-        31 };
+    uint8_t month_days[13] = {
+        0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+    };
 
     if ((month == 2) && days_is_leap_year(year)) {
         return (29);
@@ -146,7 +147,8 @@ void days_of_year_to_month_day(
  * @param day1 - day of month (1-31)
  * @return number of days apart, or 0 if same dates
  */
-uint32_t days_apart(uint16_t year1,
+uint32_t days_apart(
+    uint16_t year1,
     uint8_t month1,
     uint8_t day1,
     uint16_t year2,
@@ -197,8 +199,8 @@ uint32_t days_apart(uint16_t year1,
  * @param day - day of month (1-31)
  * @return number of days since epoch, or 0 if out of range
  */
-uint32_t days_since_epoch(
-    uint16_t epoch_year, uint16_t year, uint8_t month, uint8_t day)
+uint32_t
+days_since_epoch(uint16_t epoch_year, uint16_t year, uint8_t month, uint8_t day)
 {
     uint32_t days = 0; /* return value */
     uint16_t yy = 0; /* year */
@@ -233,7 +235,8 @@ uint32_t days_since_epoch(
  * @param pDay - day of month (1-31)
  * @return nothing
  */
-void days_since_epoch_to_date(uint16_t epoch_year,
+void days_since_epoch_to_date(
+    uint16_t epoch_year,
     uint32_t days,
     uint16_t *pYear,
     uint8_t *pMonth,