lilypond: add page (#4500)

pages/common/lilypond.md

@@ -0,0 +1,24 @@
+# lilypond
+
+> Typeset music and/or produce MIDI from file.
+> More information: <https://lilypond.org/index.html>.
+
+- Compile a lilypond file into a PDF:
+
+`lilypond {{path/to/file}}`
+
+- Compile into the specified format:
+
+`lilypond --formats={{format_dump}} {{path/to/file}}`
+
+- Compile the specified file, suppressing progress updates:
+
+`lilypond -s {{path/to/file}}`
+
+- Compile the specified file, and also specify the output filename:
+
+`lilypond --output={{path/to/output_file}} {{path/to/input_file}}`
+
+- Show the current version of lilypond:
+
+`lilypond --version`