Use a macro to compute the size of arrays at compile time (#18044)

* Add ARRAY_SIZE and CEILING utility macros

* Apply a coccinelle patch to use ARRAY_SIZE

* fix up some straggling items

* Fix 'make test:secure'

* Enhance ARRAY_SIZE macro to reject acting on pointers

The previous definition would not produce a diagnostic for
```
int *p;
size_t num_elem = ARRAY_SIZE(p)
```
but the new one will.

* explicitly get definition of ARRAY_SIZE

* Convert to ARRAY_SIZE when const is involved

The following spatch finds additional instances where the array is
const and the division is by the size of the type, not the size of
the first element:
```
@ rule5a using "empty.iso" @
type T;
const T[] E;
@@

- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)

@ rule6a using "empty.iso" @
type T;
const T[] E;
@@

- sizeof(E)/sizeof(T)
+ ARRAY_SIZE(E)
```

* New instances of ARRAY_SIZE added since initial spatch run

* Use `ARRAY_SIZE` in docs (found by grep)

* Manually use ARRAY_SIZE

hs_set is expected to be the same size as uint16_t, though it's made
of two 8-bit integers

* Just like char, sizeof(uint8_t) is guaranteed to be 1

This is at least true on any plausible system where qmk is actually used.

Per my understanding it's universally true, assuming that uint8_t exists:
https://stackoverflow.com/questions/48655310/can-i-assume-that-sizeofuint8-t-1

* Run qmk-format on core C files touched in this branch

Co-authored-by: Stefan Kerkmann <karlk90@pm.me>

1 files changed, 1 insertions, 1 deletions

diff --git a/keyboards/acheron/shark/beta/keymaps/gondolindrim/keymap.c b/keyboards/acheron/shark/beta/keymaps/gondolindrim/keymap.c
index cae98411d6..fd7f556b56 100755
--- a/keyboards/acheron/shark/beta/keymaps/gondolindrim/keymap.c
+++ b/keyboards/acheron/shark/beta/keymaps/gondolindrim/keymap.c
@@ -94,7 +94,7 @@ encoder_mode_t encoder_modes[] = {
 	// Insert your custom encoder mode here
 };
 
-#define NUM_ENCODER_MODES (sizeof(encoder_modes)/sizeof(encoder_modes[0]))
+#define NUM_ENCODER_MODES ARRAY_SIZE(encoder_modes)
 
 // This counter is used to track what encoder mode is being used at a certain time
 int encoder_mode_count = 0;