Warn about D203 formatter incompatibility

[MichaReiser]

Summary

Fixes #12220

Test Plan

Select all

❯ cargo run --bin ruff -- format ../test/test2.py  --no-cache
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
     Running `target/debug/ruff format ../test/test2.py --no-cache`
warning: `one-blank-line-before-class` (D203) and `no-blank-line-before-class` (D211) are incompatible. Ignoring `one-blank-line-before-class`.
warning: `multi-line-summary-first-line` (D212) and `multi-line-summary-second-line` (D213) are incompatible. Ignoring `multi-line-summary-second-line`.
1 file left unchanged

With D211 ignored (and D203 enabled)

ruff on  main [$!] is 📦 v0.5.1 via 🐍 v3.12.4 via 🦀 v1.79.0 
❯ cargo run --bin ruff -- format ../test/test2.py  --no-cache
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
     Running `target/debug/ruff format ../test/test2.py --no-cache`
warning: `multi-line-summary-first-line` (D212) and `multi-line-summary-second-line` (D213) are incompatible. Ignoring `multi-line-summary-second-line`.
warning: The following rules may cause conflicts when used with the formatter: `D203`. To avoid unexpected behavior, we recommend disabling these rules, either by removing them from the `select` or `extend-select` configuration, or adding them to the `ignore` configuration.
1 file left unchanged

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.