Fix/cleanup/rephrase miscellaneous stuff (#983)

* Add parens around params usage in VEC_SET macro

* Remove unnecessary space character in a xml

* Use defines instead of magic values in head/tail magic comments

* Use `OS_USEC_TO_CYCLES` to make a time look better in `Graph_TaskSet00`

* `0x25800` -> `sizeof(u16[SCREEN_HEIGHT][SCREEN_WIDTH])`

* `0x803DA800` -> `0x80400000 - frame buffer size`

* Use `OS_VI_` defines instead of hex

* Add empty line after some variable declarations

* Remove unused `extern CutsceneData` in `z_bg_dy_yoseizo.c`

* `Matrix_MtxFToYXZRotS` does not use `MTXMODE_`

* Use `MTXMODE_` more

* Remove `ASCII_TO_U32`, use `'IS64'`

* Add explicit `!= NULL` in some ternaries

* Use `INV_CONTENT`, `AMMO` macros more

* Use `PLAYER_AP_` enum more to compare to `Player#heldItemActionParam`

* Get rid of lowercase hex (outside libultra)

* `gWindMill*` -> `gWindmill*`

* Format and small fix enums in `z_boss_mo.h`

* Use `CHECK_BTN_ANY` more

* Fix xz/xy mistake in comment in tektite

* Rephrase comments mentioning "the devs" in a more neutral way

* Clean-up some objectively useless parens

* Fix some negative values written as u16 instead of s16 in ichains

* `SKJ_ACTON_` -> `SKJ_ACTION_`

* Run formatter

* Fix unk_ offset of `TransformUpdateIndex#unk_10` -> `unk_0E`

* Remove comments using in-game text

* Remove `U` suffix from integer literals

* Revert "Remove `ASCII_TO_U32`, use `'IS64'`"

This reverts commit c801337dde.

* Use `PLAYER_STR_*` to compare to `CUR_UPG_VALUE(UPG_STRENGTH)`

* Add empty line after decl x2

* Revert "Use `PLAYER_STR_*` to compare to `CUR_UPG_VALUE(UPG_STRENGTH)`"

This reverts commit d80bdb32da.

* Make `CUR_UPG_VALUE(UPG_STRENGTH)` compare to integers (eventually needs its own enum)

* Only use `PLAYER_SHIELD_` enum with `Player#currentShield`

* Only use `PLAYER_TUNIC_` enum with `Player#currentTunic`

src/code/z_play.c

@@ -244,7 +244,7 @@ void Gameplay_Init(GameState* thisx) {
         gSaveContext.cutsceneIndex = 0;
     }
 
-    if (gSaveContext.nextDayTime != 0xFFFFU) {
+    if (gSaveContext.nextDayTime != 0xFFFF) {
         gSaveContext.dayTime = gSaveContext.nextDayTime;
         gSaveContext.skyboxTime = gSaveContext.nextDayTime;
     }