[FEATURE] Integration of the codemirror plugin

...demirror/plugins/codemirror/CodeMirror/theme/ambiance.css

...irror/plugins/codemirror/CodeMirror/theme/base16-dark.css

...rror/plugins/codemirror/CodeMirror/theme/base16-light.css

...mirror/plugins/codemirror/CodeMirror/theme/blackboard.css

...codemirror/plugins/codemirror/CodeMirror/theme/cobalt.css

...mirror/plugins/codemirror/CodeMirror/theme/colorforth.css

...odemirror/plugins/codemirror/CodeMirror/theme/eclipse.css

...odemirror/plugins/codemirror/CodeMirror/theme/elegant.css

...irror/plugins/codemirror/CodeMirror/theme/erlang-dark.css

...irror/plugins/codemirror/CodeMirror/theme/lesser-dark.css

...ce-codemirror/plugins/codemirror/CodeMirror/theme/mbo.css

...demirror/plugins/codemirror/CodeMirror/theme/mdn-like.css

...demirror/plugins/codemirror/CodeMirror/theme/midnight.css

...odemirror/plugins/codemirror/CodeMirror/theme/monokai.css

...e-codemirror/plugins/codemirror/CodeMirror/theme/neat.css

...ce-codemirror/plugins/codemirror/CodeMirror/theme/neo.css

...-codemirror/plugins/codemirror/CodeMirror/theme/night.css

...rror/plugins/codemirror/CodeMirror/theme/paraiso-dark.css

...ror/plugins/codemirror/CodeMirror/theme/paraiso-light.css

...or/plugins/codemirror/CodeMirror/theme/pastel-on-dark.css