#2543 README translations: the Apple Silicon line and the BENCH.bat paragraph, as in the English README

Description

**What it changes.** All six translations (zh-CN, ja, de, fr, es, pt-BR) lacked the same two pieces of the English README. This adds them to each, in the same place as in the English:

- the **Apple Silicon Macs (M1 to M5)** line in the experimental list under "What you need" (English line 69), between Intel Arc and Strix Halo;
- the **Is it fast on your PC?** paragraph (`BENCH.bat` / `./bench.sh`, 5-10 minutes, link to `docs/COMMUNITY_BENCHMARKS.md#run-the-benchmark`) at the end of "Install" (English line 119).

One PR for all six languages because the change is the same in each (+3 lines per file).

**What it leaves alone.** The English README and every other line of the translations. No new numbers: the 5-10 minutes, 4K/16K and M1 to M5 are copied from the English.

**How it was checked.**
- Each translation was compared with the English section by section, every number, command and link: apart from these two items they match (no stale numbers, no differing links).
- Every relative link and anchor in `README*.md` and `docs/*.md` resolves (the new ones point to `docs/MAC.md` and the existing `## Run the benchmark` heading).
- Each new line follows its file's own terms and register (du in German, tú in Spanish, você in pt-BR, the file's words for prompt and agent in ja and zh-CN, full-width punctuation in ja and zh-CN, a space before the colon in French).

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