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/romhack-fetch.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 """Acquire, patch, validate, and place worthwhile Pokémon ROM-hacks into the
-EmuDeck library at /storage1/Emulation/roms/<platform>/Hacks/ on valhalla.
+EmuDeck library at /storage1/Emulation/roms/<platform>/ on valhalla.
 
 Each hack is one MANIFEST entry naming its source. Two source kinds:
   - "rom":   a pre-patched full ROM is downloaded and placed as-is (validated).
@@ -242,7 +242,7 @@ def main():
                 raise RuntimeError(f"validation: {verr}")
             crc = zlib.crc32(open(src, "rb").read()) & 0xffffffff
             if place:
-                dst_dir = os.path.join(ROMS, plat, "Hacks")
+                dst_dir = os.path.join(ROMS, plat)
                 os.makedirs(dst_dir, exist_ok=True)
                 shutil.copy2(src, os.path.join(dst_dir, out_name))
                 detail += " | PLACED"
@@ -253,7 +253,7 @@ def main():
     for hk, pl, st, dt, nm in rows:
         print(f"[{st:4}] {pl:4} {hk:<20} {dt}")
         if st == "OK":
-            print(f"         -> {pl}/Hacks/{nm}")
+            print(f"         -> {pl}/{nm}")
     print(f"\nplaced: {'YES (--place)' if place else 'NO (dry run; pass --place)'}")
 
 if __name__ == "__main__":