Fix all struct names to be consistent with the agreed upon style guide.

[luckytyphlosion]

There are still some style directions relating to structs which have no consensus. Those can be found at issue #212

1. All structs must have a corresponding typedef. The typedef must be defined with the struct.

See issue #212 point 5 for recursive/self-referential/"references each other" structs.

• Good:

typedef struct BattleCursor {
    void *unk0[5];
    SysTask *task;
} BattleCursor;

Opaque struct declaration (only okay if the corresponding file isn't decompiled yet)

typedef struct GameStats GameStats;

• Bad:

Missing corresponding typedef.

struct BattleCursor {
    void *unk0[5];
    SysTask *task;
};

Same as above but for opaque struct declaration.

struct GameStats;

Corresponding typedef is separate from struct definition.

struct BattleCursor {
    void *unk0[5];
    SysTask *task;
};
typedef struct BattleCursor BattleCursor;

struct must be defined as well as the typedef.

typedef struct {
    void *unk0[5];
    SysTask *task;
} BattleCursor;

2. Refer to the typedef in code, not the struct

• Good:

const HiddenItemData *table = sHiddenItemParam;

• Bad:

const struct HiddenItemData *table = sHiddenItemParam;

3. Struct names must match the typedef struct name

• Good:

typedef struct HeapParam {
    u32 size;         // maximum size of the heap
    OSArenaId arena;  // where to allocate the heap from
} HeapParam;

• Bad:

typedef struct HeapParam {
    u32 size;         // maximum size of the heap
    OSArenaId arena;  // where to allocate the heap from
} HeapParam_t; // _t suffix

4. Struct names and typedef struct names must be PascalCase

• Good:

typedef struct WildEncounter {
    int state;
    int effect;
    int bgm;
    int *winFlag;
    BattleSetup *setup;
} WildEncounter;

• Bad:

//  using ALL_CAPS instead of PascalCase
typedef struct WILD_ENCOUNTER {
    int state;
    int effect;
    int bgm;
    int *winFlag;
    BATTLE_SETUP *setup;
} WILD_ENCOUNTER;