feat(fees): add fee header support

[glevco]

Depends on #1412

Motivation

Add support for FeeHeader on txs via feature activation.

Acceptance Criteria

• Add FeeHeader as an allowed header on transactions.
• Increase the get_maximum_number_of_headers from 1 to 2.
  • A new verification is added to prevent duplicate headers.
• Remove the ENABLE_FEE_TOKEN setting. It's replaced by ENABLE_NANO_CONTRACTS, since these features will be activated together.
  • Both the TokenVersion.FEE and the FeeHeader are now gated behind the nano feature activation.
• Update DAGBuilder to support:
  • Fee-based token creation txs.
  • Txs with a FeeHeader.

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

[codecov]

Codecov Report

❌ Patch coverage is 92.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.91%. Comparing base (72d74b4) to head (7b51f99).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
hathor/dag_builder/builder.py	83.33%	2 Missing and 2 partials ⚠️
hathor/dag_builder/default_filler.py	87.50%	0 Missing and 1 partial ⚠️
hathor/dag_builder/vertex_exporter.py	96.55%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1414      +/-   ##
==========================================
+ Coverage   85.90%   85.91%   +0.01%     
==========================================
  Files         434      434              
  Lines       33615    33673      +58     
  Branches     5270     5280      +10     
==========================================
+ Hits        28877    28931      +54     
- Misses       3692     3697       +5     
+ Partials     1046     1045       -1     

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The base branch was changed.

[github-actions]

Bencher Report

Branch	feat/fee-header-dag-builder
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	1.98 m (+15.18%) Baseline: 1.72 m	1.55 m (78.14%)	2.06 m (95.98%)

🐰 View full continuous benchmarking report in Bencher

[raul-oliveira]

LGTM