Improve "range check helper" error messages

[mitschabaude]

rangeCheckHelper: expected XXX to fit in 64 bits

These errors can occur in most UInt64 and UInt32 methods (because they include a "range check").
They should be made more accessible to users and present solutions to the problem.

Example: #895

[mitschabaude]

Update: with #902, these errors arguably get even worse because rangeCheckHelper will not throw an error anymore. So we get something like

UInt32.from(3).sub(5);

/home/gregor/o1/mina/src/lib/snarkyjs/src/lib/field.ts:156
          throw Error(`Field.assertEquals(): ${this} != ${y}`);
                ^

Error: Field.assertEquals(): 0 != 28948022309329048855892746252171976963363056481941560715954676764349967630336
    at Field.assertEquals (snarkyjs/src/lib/field.ts:156:17)
    at UInt32.sub (snarkyjs/src/lib/int.ts:542:41)