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• I have searched the issue tracker and did not find an issue describing my bug.

Description of your suggestion.

Add compatibility for the multiple states of blocks.

At the moment, the only way to specify a state is if it's a boolean (true or false), and only if it's true. However, in a modpack, adding the ability to define multiple states, whether they are boolean or not, would help modpack authors a ton, as well as let players further configure their playthroughs!

Say I wanted a higher temperature for lit candles and there are four candles total. I can't do that right now, because I can only specify it for when the block itself is lit ("lit": true). See the current way:

{
    "minecraft:candle": {
        "property": "lit",
        "max_count": 1,
        "0": 1,
        "1": 0,
        "2": 0,
        "3": 0
    }
}

But I want it to have different temperatures for multiple different states. Compatibility would look something like this:

{
    "minecraft:candle": {
        "properties": {
            "lit": true,
            "candles": 4
        },
        "max_count": 1,
        "0": 1,
        "1": 0,
        "2": 0,
        "3": 0
    }
}

You can see in this example that I have specified that the candle block must be lit and it must have 4 candles total for it to have a heating temperature of 1. (You can see the properties in F3 when looking at a block.)