Incompatibility between `number: bigint` and high-precision floating point arithmetic

with math.js 14.6.0
```
math.config({
number: "bigint",
precision: 998,
relTol: 1e-320,
absTol: 1e-323,
numberFallback: "BigNumber"
});
```
outch, a part of the code doing stuff like :

- `math.log10( 0n )` (which before was containing bignumbers) returns errors now "i.toNumber is not a function"
- `math.log( 123n )` returns now 4.812184355372417 , before it was returning a bignumber of 998 digits
- `floor(log10(( 1n )))` returns now "Number of decimals in function round must be an integer from 0 to 15 inclusive"

I was parsing big integers as bignumber to return long primes and now I get messages like this "Cannot mix BigInt and other types, use explicit conversions"

the price to pay in code update seems very high , and all calculations based on logarithms no longer return the configuration's precision. every constant are now limited to few digits math.pi = 3.141592653589793.

_Originally posted by @nycos62 in https://github.com/josdejong/mathjs/discussions/3533#discussioncomment-14504003_

These are all bugs; it should be possible to conveniently perform high-precision floating-point arithmetic when (perhaps _especially_ when) numbers default to bigints.