mcs: add page (#7897)

* Create mcs page:
- closes #7418

* Use ellipsis

pages/common/mcs.md

@@ -0,0 +1,16 @@
+# mcs
+
+> Mono C# Compiler.
+> More information: <https://manned.org/mcs.1>.
+
+- Compile the specified files:
+
+`mcs {{path/to/input_file1.cs path/to/input_file2.cs ...}}`
+
+- Specify the output program name:
+
+`mcs -out:{{path/to/file.exe}} {{path/to/input_file1.cs path/to/input_file2.cs ...}}`
+
+- Specify the output program type:
+
+`mcs -target:{{exe|winexe|library|module}} {{path/to/input_file1.cs path/to/input_file2.cs ...}}`