Polish settings, add matching defaults, drop pkg2zip, externalize infra config

- Rework Settings tab into grouped sections
- Add preferred-region matching and full-hash-by-default setting
- Replace combo-box square arrow with a proper chevron
- Fix UMD Refresh button (clicked bool was clearing the view)
- Remove pkg2zip.exe fallback (pure-Python decryptor is the primary path)
- Move LAN IP/share paths to .env; use example defaults in config

data/bin/ATTRIBUTION.md

@@ -1,38 +0,0 @@
-# pkg2zip
-
-The `pkg2zip.exe` binary in this folder is kept as an optional fallback for
-decrypting NoPayStation `.pkg` files (PSP / PSX / PS3 / PSVita content). The
-app normally uses its own pure-Python decryptor (`app/pkg.py`) and only runs
-this binary if that fails.
-
-- Project: <https://github.com/mmozeiko/pkg2zip>
-- Author: Marcin Mikołajczak (mmozeiko)
-- Version: v1.8 (bundled)
-- License: MIT
-
-The Windows binary is run through Wine on Linux/macOS (see
-`app/nopaystation.py`).
-
-## License
-
-MIT License
-
-Copyright (c) 2017 Marcin Mikołajczak (mmozeiko)
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.