🔧 🎨 Revise lint rules

[ff137]

Material changes in this PR:

• 🎨 Stricter docstring enforcement:
  • Remove blank lines after docstrings
  • Require a blank line at the end of multiline docstring
• 🔧 Add isort to selected ruff rules (enforces import sorting)

The motivation for the stricter docstring enforcement is coming from the fact that the large Kanon contribution (#3850) includes many micro-format changes (adding/removing blank lines) that touches many files. These types of changes should be applied automatically and enforced by lint checkers, so we don't have to worry about things like that.

If merged before the Kanon PR, this will make reviewing the actual diff much easier.

---

Immaterial changes in this PR:

• ♻️ Sync ruff version in workflows (no format changes between 0.12 -> 0.13)
• 🔧 Remove unnecessary lint.ignore rules (previously ignored rules that have at some point been fixed / make no changes to code)
• 🎨 Add comments describing each lint rule being ignored and selected
• 🎨 Add a recommended lint rules to be added later (commented out)
  • e.g.: ANN (type annotation checks), ASYNC (detect blocking methods being called in async code), B (flake8-bugbear, detect likely bugs), etc.

[sonarqubecloud]

Quality Gate failed

Failed conditions
3.4% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[ff137]

For reviewers: I recommend going through each commit: https://github.com/openwallet-foundation/acapy/pull/3900/commits
I kept commits granular to help with reviewing the large number of files changed

[jamshale]

I'm fine with this 👍

[swcurran]

LGTM