Upstream merge 1.11.0

[JesseHerrick]

Note

Medium Risk
Medium risk because it adds/changes multiple AST rewrites (e.g., single-clause case to assignments, new pipe/Req optimizations, alias application) that can alter generated code and, in a few cases, runtime behavior.

Overview
Bumps Styler to 1.11.0 and expands the formatter’s rewrite set, including single-clause case → assignment extraction, stricter cond final-clause normalization to true, new stdlib pipe optimizations, and Req pipe collapsing (e.g. Req.new/merge + execute → Req.execute/2).

Improves module directive handling by adding alias application and better alias lifting in snippets, deduping embedded aliases, and preventing module attributes referenced by use/@moduledoc from being moved below their references.

Adds experimental mix tasks mix styler.remove_unused (removes unused alias|import|require based on compile warnings) and mix styler.inline_attrs (inlines single-use literal module attributes), plus a new minimum_supported_elixir_version config used to gate deprecation rewrites like :timer.hours/1 → to_timeout/1.

Includes internal refactors/bugfixes affecting traversal and comment/line handling (Zipper path structure, comment range detection, config sorting), plus a major docs reorg (new docs/general_styles.md, styles TOC) and updated README/CHANGELOG.

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