MDL-78349 tiny_recordrtc: Add lamejs library

lib/editor/tiny/plugins/recordrtc/readme_moodle.txt

@@ -0,0 +1,32 @@
+lamejs 1.2.1
+--------------
+https://github.com/zhuker/lamejs
+
+Instructions to import lamejs into Moodle:
+
+1. Download the latest lamejs code somewhere (example /tmp/lamejs) using:
+
+mkdir -p /tmp/lamejs
+cd /tmp/lamejs
+npm install lamejs --save-dev
+
+Note down the version number displayed by the command, to update lib/editor/tiny/plugins/recordrtc/thirdpartylibs.xml accordingly.
+
+If the command does not output a version number, the version number can be found in package.json. You can simply open package.json
+using your desired editor and look for the version number of lamejs. Alternatively, you may use the following commands:
+- MacOS:
+    cat package.json | grep lamejs
+- Linux:
+    cat package.json | grep lamejs
+    or
+    jq -r '.devDependencies."lamejs"' package.json
+
+2. Copy the following file to your local Moodle directory, to replace the old one:
+
+cp /tmp/lamejs/node_modules/lamejs/lame.all.js [PATH TO YOUR MOODLE]/lib/editor/tiny/plugins/recordrtc/amd/src/lame.all.js
+
+3. Add the following code to the bottom of the `lib/editor/tiny/plugins/recordrtc/amd/src/lame.all.js` file:
+
+export default lamejs;
+
+4. Update the new version in the `lib/editor/tiny/plugins/recordrtc/thirdpartylibs.xml` file.

lib/editor/tiny/plugins/recordrtc/thirdpartylibs.xml

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+<?xml version="1.0"?>
+<libraries>
+  <library>
+      <location>amd/src/lame.all.js</location>
+      <name>lamejs</name>
+      <version>1.2.1</version>
+      <license>LGPL</license>
+      <repository>https://github.com/zhuker/lamejs</repository>
+  </library>
+</libraries>