Make most of functions const correct (#714)

* Make most of the functions const correct

Used clang-tidy and sonarlint to help find places where const could
pretty easily applied. Also lot of hand work.

This commit does not yet touch handlers and typedefs of those.

* Fix Arduino uno handler_who_is() has extra parenthesis

For some reason there is extra parenthesis. Remove it this is more
likely buildable.

* Bugfix/bacapp: Fix uninitilized array_index

We have changed bacapp_snprintf_value() to be const correct. After that
we got

```
/home/runner/work/bacnet-stack/bacnet-stack/src/bacnet/bacapp.c:3183:27: warning: 4th function call argument is an uninitialized value [core.CallAndMessage]
                ret_val = bacapp_snprintf_weeklyschedule(
                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
```

So analyzer could now spot that we do not actually initilize array_index
at all. Fix this by setting array_index to zero. Note that I actually do
not know if zeroing is right thing to do here. I choose zero as if this
has worked before it is most likely that it will work with zero value.

* cmake: Add and ignore Wwrite-strings compiler option

Wwrite-strings helps find places where const correctness is broken.

Example it will warn about these

```C

void func1(char* str);

func("test") /* "test" is const so we should not pass it to func1().

char* func2()
{
  return "test"; /* func2() should return const char*.
}
```

We still need to ignore it as not all are fixed but let's add it already
so we remember that it should be opened at some point.

---------

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

src/bacnet/basic/object/device.h

@@ -312,7 +312,7 @@ extern "C" {
         void);
     BACNET_STACK_EXPORT
     void Device_UUID_Set(
-        uint8_t *new_uuid,
+        const uint8_t *new_uuid,
         size_t length);
     BACNET_STACK_EXPORT
     void Device_UUID_Get(
@@ -353,7 +353,7 @@ extern "C" {
         BACNET_CHARACTER_STRING * object_name);
     BACNET_STACK_EXPORT
     bool Device_Set_Object_Name(
-        BACNET_CHARACTER_STRING * object_name);
+        const BACNET_CHARACTER_STRING * object_name);
     /* Copy a child object name, given its ID. */
     BACNET_STACK_EXPORT
     bool Device_Object_Name_Copy(
@@ -443,7 +443,7 @@ extern "C" {
 
     BACNET_STACK_EXPORT
     bool Device_Valid_Object_Name(
-        BACNET_CHARACTER_STRING * object_name,
+        const BACNET_CHARACTER_STRING * object_name,
         BACNET_OBJECT_TYPE *object_type,
         uint32_t * object_instance);
     BACNET_STACK_EXPORT
@@ -498,7 +498,7 @@ extern "C" {
     BACNET_STACK_EXPORT
     uint16_t Add_Routed_Device(
         uint32_t Object_Instance,
-        BACNET_CHARACTER_STRING * Object_Name,
+        const BACNET_CHARACTER_STRING * Object_Name,
         const char *Description);
     BACNET_STACK_EXPORT
     DEVICE_OBJECT_DATA *Get_Routed_Device_Object(
@@ -511,16 +511,16 @@ extern "C" {
     bool Routed_Device_Address_Lookup(
         int idx,
         uint8_t address_len,
-        uint8_t * mac_adress);
+        const uint8_t * mac_adress);
     BACNET_STACK_EXPORT
     bool Routed_Device_GetNext(
-        BACNET_ADDRESS * dest,
-        int *DNET_list,
+        const BACNET_ADDRESS * dest,
+        const int *DNET_list,
         int *cursor);
     BACNET_STACK_EXPORT
     bool Routed_Device_Is_Valid_Network(
         uint16_t dest_net,
-        int *DNET_list);
+        const int *DNET_list);
 
     BACNET_STACK_EXPORT
     uint32_t Routed_Device_Index_To_Instance(