Migrate from flake8 to ruff for linting and formatting

[cfxegbert]

For linting the code base move from flake8 to ruff.

Motivation

• Performance: Written in Rust, Ruff is often 10–100x faster than traditional Python-based linters like Flake8. This makes it fast enough to run on every file save, providing near-instant feedback during development.
• Tool consolidation: Ruff serves as a "Swiss Army knife," replacing not just Flake8 but also isort, pydocstyle, pyupgrade, autoflake, and dozens of popular Flake8 plugins.
• Built-in auto-fixing: Ruff can automatically fix many violations, such as removing unused imports or upgrading syntax, using the --fix flag.
• Code formatting: Ruff can also be used for code formatting that matches the formatting from black
• Doc string linting: Ensure our code documentation is using one style of documentation strings.

Related Issues/PRs

• consolidate docstring style #51
• Automatically format the code base #1584

Implementation

• Create ruff.toml configuration that lints the code base without any changes to the code base.
• Add GitHub action to add ruff linting to workflow
• Incrementally enable more ruff rules. Only enable a few rules at a time to limit the size of the pull requests to facilitate code reviews. As mentioned in Automatically format the code base #1584 use .git-blame-ignore-revs to not cause large formatting changes to not muddle up the blame history. Repeat until we feel we have implemented all the rules that we feel are necessary.
• Disable current flake8 GitHub action in workflow.
• Enable ruff formatting.

[cfxegbert]

Rule sets

This comment will be kept up-to-date with the current rule sets that have been implemented.

	Rule set	Name	Description	Notes
N/A	AIR	Airflow
	ERA	Eradicate	Commented out code
N/A	FAST	FastAPI
✔️	YTT	flake8-2020	Misuse of sys.version or sys.version_info
	ANN	flake8-annotations	PEP 3107-style function annotations	Return types currently annotated but function parameters are not
✔️	ASYNC	flake8-async	Problems related to Trio, AnyIO, or asyncio	Code doesn't use async at this time
	S	flake8-bandit	Security testing
	BLE	flake8-blind-except	Check for except: and except Exception: statements	Maybe hard to enforce
	FBT	flake8-boolean-trap	Boolean positional arguments
	B0,B9	flake8-bugbear
	A0	flake8-builtins	Shadowing of python built-ins
	COM	flake8-commas	Missing trailing commas	Easier to enforce with ruff format
	C4	flake8-comprehensions	List, set, and dict domprehensions
	CPY	flake8-copyright	Enforce copyright at top of file	Only available in preview mode
✔️	DTZ	flake8-datetimez	Safe use of datetime
✔️	T10	flake8-debugger	Check for pdb;idbp imports and set traces
N/A	DJ	flake8-django
	EM	flake8-errmsg	Nice error messages
✔️	EXE	flake8-executable	Shebang checks
	FIX	flake8-fix	Check for TODO, FIXME, HACK, XXX comments	Will we allow TODOs?
✔️	FA	flake8-future-annotations	from future import annotation checks
✔️	INT	flake8-gettext	Proper use of gettext	Will we ever i18n rez?
✔️	ISC	flake8-implicit-str-concat	Corrent string literal concatenation
✔️	ICN	flake8-import-conventions	Common import aliases for 3rd-party libraries
✔️	LOG	flake8-log	Proper use of the standard logging library
	G	flake8-logging-format	Proper formatting of logging strings
✔️	INP	flake8-no-pep420	Don't allow implicit namespace packages
	PIE	flake8-pie	Misc. lints
➖	T20	flake8-print	Checks for print and pprint	Rez uses print
	PYI	flake8-pyi	Check type hinting stub files
	PT	flake8-pytest-style	Common style issues with pytest-based tests	Will rez ever use pytest?
	Q	flake8-quotes	Enforce single or double quotes
✔️	RSE	flake8-raise	Unnecessary parens in raise statements
	RET	flake8-return	Checks on return values
	SLF	flake8-self	Accessing private members in a class	Rez uses thoughout code
	SIM	flake8-simplify	Simplify code
✔️	SLOT	flake8-slots	Enforce slots on immutable subclasses
✔️	TID	flake8-tidy-imports	Write tidier imports
	TD	flake8-todos	Make sure TODO are properly formatted	Will we allow TODOs?
	TC	flake8-type-checking	Check for proper imports in type checking blocks
	ARG	flake8-unused-arguments	Usused function arguments
➖	PTH	flake8-use-pathlib	Enforce use of pathlib	Pathlib has been buggy in older python versions
	FLY	flynt	Convert format strings to f-strings
	I	isort	Sort imports
	C90	mccabe	McCabe complexity
N/A	NPY	NumPy-specific rules
N/A	PD	pandas-vet
	N	pep8-naming	PEP 8 naming conventions
	PERF	perflint	Check for performance anti-patterns
✔️	E	pycodestyle	PEP 8 coding style
✔️	W	pycodestyle	PEP 8 coding style
	DOC	pydoclint	Check that function arguments match docs	Only available in preview mode
	D	pydocstyle	Python documentation style	See #51 to convert to Google docstrings
✔️	F	Pyflakes
	PGH	pygrep-hooks
	PLC	pylint-convention	Pylint coding conventions
✔️	PLE	pylint-error	Pylint errors
	PLR	pylint-refactor	Pylint refactor
	PLW	pylint-warning	Pyline warnings
	UP	pyupgrade	Upgrade to newer python syntax
	FURB	refurb	Refurbishing and modernizing Python codebases
	RUF	Ruff-specific rules
	TRY	tryceratops	Check exceptions and try blocks

• N/A - Rules that do not apply to the rez codebase
• ✔️ - Enabled rules
• ➖ - Rules not planned to implement

[JeanChristopheMorinPerso]

For context, I have discussed this with @cfxegbert and I suggested the progressive approach.