Encoding and Codec creation directly from qc-exponents

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 59.81308% with 86 lines in your changes are missing coverage. Please review.

Project coverage is 47.90%. Comparing base (30f63df) to head (06b144f).

Files	Patch %	Lines
src/rate_adaptive_code.hpp	65.15%	4 Missing and 19 partials :warning:
tests/test_rate_adaptive_code.cpp	50.00%	0 Missing and 23 partials :warning:
src/encoder_advanced.hpp	68.18%	13 Missing and 8 partials :warning:
tests/test_encoder_advanced.cpp	52.00%	0 Missing and 12 partials :warning:
benchmarks_error_rate/code_simulation_helpers.hpp	28.57%	3 Missing and 2 partials :warning:
src/encoder.hpp	50.00%	0 Missing and 1 partial :warning:
tests/test_read_ldpc_from_files.cpp	0.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #19 +/- ## ========================================== + Coverage 46.47% 47.90% +1.42% ========================================== Files 11 13 +2 Lines 936 1073 +137 Branches 559 613 +54 ========================================== + Hits 435 514 +79 - Misses 82 98 +16 - Partials 419 461 +42 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[adomasbaliuka]

Breaking changes:

• removes RateAdaptiveCode template parameter Bit. This is now a template parameter of underlying functions, which is more flexible (and hopefully not too much more complicated/prone to errors...)
• (ABI-breaking) reworks underlying data representation for RateAdaptiveCode.

Non-breaking changes:

• New header encoder_advanced.hpp. Enables constexpr storage of QC-exponents for a code in a grouped manner. For how to use, see unit test in test_encoder_advanced.cpp. Requires C++20.
• Enable construction of RateAdaptiveCode from a vector<vector<idx_t>> mother_pos_varn
• Together, these also enable creating RateAdaptiveCode from QC-exponents stored statically in C++.