refactor: standardize hack filenames to [Hack] and flatten to platform root

Switch the library naming convention from "Pokemon - <Name> (Hack)" to
"Pokemon - <Name> [Hack][version][tags]", and place hacks in the platform
root (roms/<plat>/) instead of a Hacks/ subfolder. Applied across the live
valhalla library (272 hack/fan-game files) via scripts/standardize-names.py.

- romhack-import.py / romhack-fetch.py: emit [Hack], write to roms/<plat>/
- romhack-pc-migrate.py: emit [Hack]
- build-romhack-vault.py (archived): update documented library_path
- standardize-names.py: new one-shot, self-fetching standardizer (idempotent;
  pipes \n-only bytes over SSH to avoid Windows CRLF corrupting filenames)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scripts/build-romhack-vault.py

@@ -319,7 +319,7 @@ def gen_hack_note(h):
         f'status: "{status}"',
         f"type: {yaml_list(types)}",
         f'generation: "{gen}"',
-        f'library_path: "roms/{plat}/Hacks/{libname}"',
+        f'library_path: "roms/{plat}/{libname}"',
         f'source: "{url or lookup_url(title)}"',
         f"added: {ADDED}",
         f"tags: {yaml_list(tags)}",
@@ -343,7 +343,7 @@ def gen_hack_note(h):
         f"- Lookup: {lookup_url(title)}",
         "",
         "## In the library",
-        f"- `roms/{plat}/Hacks/{libname}` on valhalla",
+        f"- `roms/{plat}/{libname}` on valhalla",
         f"- Patch/source artifact archived under `/storage1/igir/romhacks/patches/`",
         "",
         "[[Index|← back to directory]]",