Migrate golang.org/x/exp/slog to log/slog

Proprietary

Repoint golang.org/x/exp/slog at the standard library log/slog, added in Go 1.21, and rename the context-taking helpers the standard library spells differently: DebugCtx, InfoCtx, WarnCtx and ErrorCtx become DebugContext, InfoContext, WarnContext and ErrorContext. x/exp carries both spellings, so a file already on the Context ones is a plain path swap.

org.openrewrite.golang.migration.MigrateXExpSlogToStdlib
mod run . --recipe=org.openrewrite.golang.migration.MigrateXExpSlogToStdlib

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.