PROCESS JSON COMMAND - New Features

[jetrotal]

The Operations were updated to:

0: GET
1: SET
2: GET LENGTH
3: GET KEYS
4: GET VAR TYPE

There are also new Flags:

• Extract data from json path - similar to how stringvars extracts \v[1], \t[2], etc.
• Prettify json - to make its output easier to read.

[Ghabry]

We had this discussion before: Exceptions (try-catch) are not enabled on emscripten to reduce binary size.

(and our homebrew platforms but they do not have JSON support enabled so you do not see them failing here)

[jetrotal]

Sorry about the confusion, Now the code is way closer to how initially was

[jetrotal]

I found some OOB crashes from the older implementation,
When trying to reach /lists/data/6 from:

"lists": {
            "length": 5,
            "data": [{
                    "id": "MAP TYPE",
                    "length": 7,
                    "values": ["EasyRPG World", "EasyRPG Exterior", "EasyRPG Interior", "EasyRPG Dungeon", "EasyRPG Ship", "Uncanny World", "Danny's House"],
                    "chipset_files": ["EasyRPG_World", "EasyRPG_Exterior", "easyRPG_interiorB", "EasyRPG_Dungeon", "EasyRPG_Ship", "EasyRPG+gfragger_mkt_CCBY", "EasyRPG+kotatsuAkira_Interior_CC0"],
                    "tileset_locations": [1531, 1535, 1534, 1533, 1532, 523, 524],
                    "current": 0
                },
                {
                    "id": "TILES LAYER",
                    "length": 3,
                    "values": ["LOWER", "UPPER", "EVENTS"],
                    "current": 0
                },
                {
                    "id": "DRAW AUTOTILES",
                    "length": 2,
                    "values": ["YES", "NO"],
                    "current": 0
                },
                {
                    "id": "MAP PANORAMA",
                    "length": 4,
                    "values": ["[OFF]", "A", "B", "C"],
                    "current": 0
                },
                {
                    "id": "BACKGROUND MUSIC",
                    "length": 4,
                    "values": ["[OFF]", "A", "B", "C"],
                    "current": 0
                }
            ]
        },

I thought about adding some error messages, but those messages could conflict with cases such as:

[
[-6,-6,-6,-6,-6,-6,-6,-6,-6,-6],
[6,-6,-6,null,-6,-6,-6],[-6,-6,-6,-6,-6,-6,-6,null,null,null,-6,-6],
[-6,6,-6,null,-6,-6,-6,-6,-6,-6,-6,-6],
[-6,6,6,null,14,14,14,-6,14,14,14,-6,14,14,14,null,14,14,14,6],
[6,6,6,null,null,14,6,null,14,null,null,null,14,-6,-6,-6,-6,14]
]

where I wanted to have null values to fast walk through a list of map tiles.