uniformize linter/formatter (ruff) + add pre-commit

[mbrousset-ledger]

• add .pre-commit-config.yaml
• move workflows and codebase to ruff check and ruff format
• fixed linting and formatting issues
• add .git-blame-ignore-revs that references the formatting commit (d7e18cc)

[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot
3.6% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

❌ Patch coverage is 82.32323% with 35 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.32%. Comparing base (04943af) to head (74b54cd).

Files with missing lines	Patch %	Lines
src/ragger/gui/interface.py	4.34%	22 Missing ⚠️
src/ragger/navigator/navigation_scenario.py	79.31%	6 Missing ⚠️
src/ragger/conftest/base_conftest.py	87.17%	5 Missing ⚠️
src/ragger/backend/ledgercomm.py	83.33%	1 Missing ⚠️
src/ragger/navigator/navigator.py	96.96%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #270   +/-   ##
=======================================
  Coverage   78.32%   78.32%           
=======================================
  Files          36       36           
  Lines        2191     2191           
=======================================
  Hits         1716     1716           
  Misses        475      475           

Flag	Coverage Δ
apex_p-py3.10	78.22% <82.32%> (ø)
apex_p-py3.11	78.22% <82.32%> (ø)
apex_p-py3.12	78.22% <82.32%> (ø)
apex_p-py3.13	78.22% <82.32%> (ø)
apex_p-py3.9	78.20% <82.32%> (ø)
flex-py3.10	78.22% <82.32%> (ø)
flex-py3.11	78.22% <82.32%> (ø)
flex-py3.12	78.22% <82.32%> (ø)
flex-py3.13	78.22% <82.32%> (ø)
flex-py3.9	78.20% <82.32%> (ø)
nanos-py3.10	76.58% <80.30%> (ø)
nanos-py3.11	76.58% <80.30%> (ø)
nanos-py3.12	76.58% <80.30%> (ø)
nanos-py3.13	76.58% <80.30%> (ø)
nanos-py3.9	76.69% <80.30%> (ø)
nanosp-py3.10	76.63% <80.30%> (ø)
nanosp-py3.11	76.63% <80.30%> (ø)
nanosp-py3.12	76.63% <80.30%> (ø)
nanosp-py3.13	76.63% <80.30%> (ø)
nanosp-py3.9	76.73% <80.30%> (ø)
nanox-py3.10	76.58% <80.30%> (ø)
nanox-py3.11	76.58% <80.30%> (ø)
nanox-py3.12	76.58% <80.30%> (ø)
nanox-py3.13	76.58% <80.30%> (ø)
nanox-py3.9	76.69% <80.30%> (ø)
stax-py3.10	78.22% <82.32%> (ø)
stax-py3.11	78.22% <82.32%> (ø)
stax-py3.12	78.22% <82.32%> (ø)
stax-py3.13	78.22% <82.32%> (ø)
stax-py3.9	78.20% <82.32%> (ø)

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