chore: added license and patch info

packages/frontend/src/scripts/libopenmpt/LICENSE

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+Copyright (c) 2004-2024, OpenMPT Project Developers and Contributors
+Copyright (c) 1997-2003, Olivier Lapicque
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the OpenMPT project nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

packages/frontend/src/scripts/libopenmpt/readme.md

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+modifications made to `libopenmpt.js` (can be taken from https://lib.openmpt.org/libopenmpt/download/):
+
+at the beginning of the file:
+```js
+// @ts-nocheck
+/* eslint-disable */
+```
+
+at the end of the file:
+```js
+Module.UTF8ToString = UTF8ToString;
+Module.writeAsciiToMemory = writeAsciiToMemory;
+export { Module }
+```
+
+replace
+```
+wasmBinaryFile="libopenmpt.wasm"
+```
+with
+```
+wasmBinaryFile=new URL("./libopenmpt.wasm", import.meta.url).href
+```