chore(license): name the copyright holder "unom - Enrico Bühler"

"unom" alone is not the legal entity name. Updated the copyright line in
all nine first-party license files -- the root MIT/Apache pair and the
hand-maintained copies under clients/apple, clients/decky,
packaging/windows/drivers and packaging/windows/pf-vkhdr-layer (there is
no script that syncs these, so each is edited directly).

The Linux and Windows clients' About screens pick this up automatically:
both `include_str!` the root LICENSE-MIT / LICENSE-APACHE at compile time.

Deliberately untouched:
- Third-party license texts (Geist OFL, FFmpeg, VB-CABLE, the vendored
  pyrowave/Granite tree, KDE protocol XMLs, the os-icon licenses) -- those
  are other parties' copyrights.
- Publisher/author/maintainer metadata, which is identity rather than
  license text and is reported separately for a decision.

LICENSE-APACHE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2026 unom
+   Copyright 2026 unom - Enrico Bühler
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

LICENSE-MIT

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 unom
+Copyright (c) 2026 unom - Enrico Bühler
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

clients/apple/Sources/PunktfunkKit/Resources/LICENSE-APACHE.txt

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2026 unom
+   Copyright 2026 unom - Enrico Bühler
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

clients/apple/Sources/PunktfunkKit/Resources/LICENSE-MIT.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 unom
+Copyright (c) 2026 unom - Enrico Bühler
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

clients/decky/LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 unom
+Copyright (c) 2026 unom - Enrico Bühler
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

packaging/windows/drivers/LICENSE-APACHE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2026 unom
+   Copyright 2026 unom - Enrico Bühler
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

packaging/windows/drivers/LICENSE-MIT

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 unom
+Copyright (c) 2026 unom - Enrico Bühler
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

packaging/windows/pf-vkhdr-layer/LICENSE-APACHE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2026 unom
+   Copyright 2026 unom - Enrico Bühler
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

packaging/windows/pf-vkhdr-layer/LICENSE-MIT

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 unom
+Copyright (c) 2026 unom - Enrico Bühler
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal