lint: replace flake8 with ruff

[mattwang44]

Types of changes

• [x] Other (introduce ruff)

Description

Introduce ruff and remove flake8

[mattwang44]

~merge 前會再 commit 一份 .git-blame-ignore-revs~ done

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.17241% with 36 lines in your changes are missing coverage. Please review.

Project coverage is 71.19%. Comparing base (6e1cdbf) to head (f4a11d2).

Files	Patch %	Lines
.../proposals/management/commands/export_proposals.py	0.00%	5 Missing :warning:
...anagement/commands/export_proposals_create_time.py	0.00%	4 Missing :warning:
src/events/views.py	0.00%	3 Missing :warning:
src/users/models.py	70.00%	3 Missing :warning:
src/ccip/views.py	66.66%	2 Missing :warning:
src/core/difftools.py	0.00%	2 Missing :warning:
src/core/views.py	50.00%	2 Missing :warning:
src/events/api/views.py	66.66%	2 Missing :warning:
src/events/models.py	77.77%	2 Missing :warning:
src/events/renderers.py	66.66%	2 Missing :warning:
... and 6 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## upgrade-django-to-3.2 #1174 +/- ## ========================================================= + Coverage 71.07% 71.19% +0.12% ========================================================= Files 84 84 Lines 3440 3451 +11 ========================================================= + Hits 2445 2457 +12 + Misses 995 994 -1 ```

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[mattwang44]

rebased