docs: write prose without dashes or semicolons

Profiles, the wiki, comments, docstrings, command output and schema descriptions carried em-dashes, clause-joining semicolons, unicode arrows, box-drawing banners and check-mark glyphs. Each sentence was rewritten rather than having its character swapped. Hashes, paths, source_ref values and every cited file:line are unchanged, which a comparison of each parsed profile against the previous revision confirms.

validate_pr comments now say PASS and FAIL in words, and source_ref values in a profile's structured blocks render as code. test_prose_style fails if any of these comes back, in tracked files or in the generated site.

scripts/scraper/retrodeck_scraper.py

@@ -456,7 +456,7 @@ class Scraper(BaseScraper):
             "verification_mode": "md5",
             "cores": cores,
             # Each component is one emulator RetroDECK ships and launches on
-            # its own; retroarch is the one that runs cores.
+            # its own, and retroarch is the one that runs cores.
             "standalone_cores": [c for c in cores if c != "retroarch"],
             "systems": systems,
         }