* main: (28 commits)
  [ty] highlight the argument in `static_assert` error messages (astral-sh#19426)
  [ty] Infer single-valuedness for enums based on `int`/`str` (astral-sh#19510)
  [ty] Restructure submodule query around `File` dependency
  [ty] Make `Module` a Salsa ingredient
  [ty] Reachability analysis for `isinstance(…)` branches (astral-sh#19503)
  [ty] Normalize single-member enums to their instance type (astral-sh#19502)
  [ty] Invert `ty_ide` and `ty_project` dependency (astral-sh#19501)
  [ty] Implement mock language server for testing (astral-sh#19391)
  [ty] Detect enums if metaclass is a subtype of EnumType/EnumMeta (astral-sh#19481)
  [ty] perform type narrowing for places marked `global` too (astral-sh#19381)
  [ty] Use `ThinVec` for sub segments in `PlaceExpr` (astral-sh#19470)
  [ty] Splat variadic arguments into parameter list (astral-sh#18996)
  [`flake8-pyi`] Skip fix if all `Union` members are `None` (`PYI016`)  (astral-sh#19416)
  Skip notebook with errors in ecosystem check (astral-sh#19491)
  [ty] Consistent use of American english (in rules) (astral-sh#19488)
  [ty] Support iterating over enums (astral-sh#19486)
  Fix panic for illegal `Literal[…]` annotations with inner subscript expressions (astral-sh#19489)
  Move fix suggestion to subdiagnostic (astral-sh#19464)
  [ty] Implement non-stdlib stub mapping for classes and functions (astral-sh#19471)
  [ty] Disallow illegal uses of `ClassVar` (astral-sh#19483)
  ...

# Conflicts:
#	crates/ty_ide/src/goto.rs

* main:
  [ty] Fix narrowing and reachability of class patterns with arguments (#19512)
  [ty] Implemented partial support for "find references" language server feature. (#19475)
  [`flake8-use-pathlib`] Add autofix for `PTH101`, `PTH104`, `PTH105`, `PTH121` (#19404)
  [`perflint`] Parenthesize generator expressions (`PERF401`) (#19325)
  [`pep8-naming`] Fix `N802` false positives for `CGIHTTPRequestHandler` and `SimpleHTTPRequestHandler` (#19432)
  [`pylint`] Handle empty comments after line continuation (`PLR2044`) (#19405)
  Move concise diagnostic rendering to `ruff_db` (#19398)
  [ty] highlight the argument in `static_assert` error messages (#19426)
  [ty] Infer single-valuedness for enums based on `int`/`str` (#19510)
  [ty] Restructure submodule query around `File` dependency
  [ty] Make `Module` a Salsa ingredient
  [ty] Reachability analysis for `isinstance(…)` branches (#19503)
  [ty] Normalize single-member enums to their instance type (#19502)
  [ty] Invert `ty_ide` and `ty_project` dependency (#19501)
  [ty] Implement mock language server for testing (#19391)
  [ty] Detect enums if metaclass is a subtype of EnumType/EnumMeta (#19481)
  [ty] perform type narrowing for places marked `global` too (#19381)

## Summary

We previously didn't recognize `Literal[Color.RED]` as single-valued, if
the enum also derived from `str` or `int`:
```py
from enum import Enum

class Color(str, Enum):
    RED = "red"
    GREEN = "green"
    BLUE = "blue"

def _(color: Color):
    if color == Color.RED:
        reveal_type(color)  # previously: Color, now: Literal[Color.RED]
```

The reason for that was that `int` and `str` have "custom" `__eq__` and
`__ne__` implementations that return `bool`. We do not treat enum
literals from classes with custom `__eq__` and `__ne__` implementations
as single-valued, but of course we know that `int.__eq__` and
`str.__eq__` are well-behaved.

## Test Plan

New Markdown tests.