Add: Chinese translation of abs() complexity documentation

[shaozk]

What This Changes

• Add Simplified Chinese translation of the abs() complexity documentation.

Type of Change

• New content
• Bug fix
• Documentation improvement
• Structure/organization

Related Issues

N/A

This is translated by an LLM and reviewed by a human.

[heikkitoivonen]

Thanks for this — the abs() page is solid work. Structure matches the English exactly (sections, paragraphs, list items, table shape), code blocks are byte-identical including the aligned-comment style, source_sha is correct and untouched, and the CJK punctuation is clean throughout. It merges cleanly onto main and passes the full make check.

Three terminology points I'd like to fix before merging, plus a note on scope. Note: these are from Claude Code running Opus 5 model. If you disagree, please let me know, and if possible, point to a source that would back your view.

1. ### 强类型 → ### 类型转换 (blocking)

The English heading is "Type Coercion", and the section is about which types abs() accepts and what it returns:

  abs(-5)          # int
  abs(-5.0)        # float
  abs(-5j)         # complex (returns float)
  abs("-5")        # TypeError

强类型 means strong typing, which is a different concept — a reader scanning for typing semantics would land here by mistake. 类型转换 (or 类型强制转换) matches the section.

2. | 实例 | → | 情况 |

For the | Case | column header. 实例 reads as instance / example. This also makes three different renderings of the same English header across the zh pages:

page	English	Chinese
sorted.md	Case	情况
memoryview_func.md	Case	操作
abs.md (this PR)	Case	实例

情况 is already established in sorted.md, so I'd standardise on that. (memoryview_func.md is a separate cleanup, not yours.)

3. ## 性能典范 — I'd like to keep 性能模式

典范 means paragon / exemplar — something held up to emulate. These sections list recurring techniques ("vs Copying", "Batch Processing"), which is "pattern" in the software sense, normally 模式 (as in 设计模式). It also splits the same English word two ways inside one file: memoryview_func.md would have 常见模式 for "Common Patterns" and 性能典范 for "Performance Patterns".

If you're reading 模式 as too weak here, I'm open to a different word — 性能实践 or similar — I'd just rather not land 典范. Happy to be corrected if I'm misreading the register.

On scope: the rename touches sorted.md and memoryview_func.md, which are otherwise unrelated to abs(). Could that go in its own PR? Headings drive anchor slugs, so renaming them breaks any existing inbound links to /zh/builtins/sorted/#性能模式. No in-repo links are affected (I checked), but it's worth deciding on its own rather than as a side effect of adding a page.

Follow-up, not your miss: the zh sidebar still shows Absolute in English for this now-Chinese page. Adding Absolute: <label> to the zh nav_translations in mkdocs.yml would complete it. We only documented that step in TRANSLATING.md after this branch was cut, so no worries — but it'd be good to include it here.

Everything else looks good to me. Thanks again!