Introduce the "denoise" option to `try_real` and `try_forceint` (and `real`)

[SethMMorton]

This option will allow inputs like 3.453e21 (or "3.453e21") to be converted to 3453000000000000000000 instead of 3452999999999999737856.

When merged it will close #69.

[codecov[bot]]

Codecov Report

Attention: 25 lines in your changes are missing coverage. Please review.

Comparison is base (c970c09) 94.51% compared to head (3258e0f) 93.81%.

Files	Patch %	Lines
src/cpp/parser.cpp	83.47%	5 Missing and 15 partials :warning:
include/fastnumbers/parser/numeric.hpp	50.00%	0 Missing and 3 partials :warning:
include/fastnumbers/buffer.hpp	87.50%	0 Missing and 1 partial :warning:
src/cpp/c_str_parsing.cpp	97.67%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #77 +/- ## ========================================== - Coverage 94.51% 93.81% -0.70% ========================================== Files 19 20 +1 Lines 1786 1989 +203 Branches 242 274 +32 ========================================== + Hits 1688 1866 +178 - Misses 22 27 +5 - Partials 76 96 +20 ```

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