feat(nano): use more custom classes with faux protection

[jansegre]

Motivation

Some classes in hathor.nanocontracts.types are simple NewTypes, which isn't ideal.

Acceptance Criteria

• Change all NewType classes to custom types with faux-immutable protection
• Rename _FauxImmutableMeta to FauxImmutableMeta for external use
• Add __allow_faux_inheritance__ to bypass inheritance restriction

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[github-actions]

Bencher Report

Branch	feat/nano/better-types
Testbed	ubuntu-22.04

Click to view all benchmark results

Benchmark	Latency	Benchmark Result minutes (m) (Result Δ%)	Lower Boundary minutes (m) (Limit %)	Upper Boundary minutes (m) (Limit %)
sync-v2 (up to 20000 blocks)	📈 view plot 🚷 view threshold	1.84 m (+10.09%) Baseline: 1.68 m	1.51 m (81.75%)	2.01 m (91.74%)

🐰 View full continuous benchmarking report in Bencher

[codecov]

Codecov Report

❌ Patch coverage is 94.11765% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.79%. Comparing base (f25fc0e) to head (65da3be).
⚠️ Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
hathor/nanocontracts/faux_immutable.py	90.00%	0 Missing and 1 partial ⚠️
hathor/nanocontracts/nc_types/bytes_nc_type.py	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1388      +/-   ##
==========================================
+ Coverage   85.77%   85.79%   +0.01%     
==========================================
  Files         429      429              
  Lines       32433    32453      +20     
  Branches     5056     5057       +1     
==========================================
+ Hits        27821    27843      +22     
+ Misses       3596     3592       -4     
- Partials     1016     1018       +2     

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