upgrade to typescript and refactor protobuf layer

[mroz22]

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[mroz22]

check:

• second tsconfig
• lib variant import

When working with JSON descriptors (i.e. generated by pbjs) and/or reflection only, see the light library (~16kb gzipped) that excludes the parser. CommonJS entry point is:
var protobuf = require("protobufjs/light");

• long

If a proper way to work with 64 bit values (uint64, int64 etc.) is required, just install long.js alongside this library. All 64 bit numbers will then be returned as a Long instance instead of a possibly unsafe JavaScript number (see).

This is exactly what we want, we want to be "long" ready. So far there is for compatibility reason this part of code that turns long instance back into number

    if (field.long) {
        return value.toNumber();
    }

it is likely that we can remove this right away because trezor-connect tests don't ever trigger this condition. we should probably make sure that trezor-connect treats following protobuf types as strings: int64, uint64, sint64, fixed64, sfixed64

• detective story of messages.json versions