start splitting the documentation to include a new article about pitch

src/documentation/learning/audio_engine/pitch.ts

@@ -0,0 +1,28 @@
+import { type Editor } from "../../../main";
+import { makeExampleFactory } from "../../../Documentation";
+
+export const pitch = (application: Editor): string => {
+  // @ts-ignore
+  const makeExample = makeExampleFactory(application);
+  return `# Pitch 
+
+
+## Pitch envelope
+	
+Similar to the amplitude envelope, you can use an envelope to shape the pitch
+of your sounds (can be samples or synthesizers). This is super useful to create
+new timbres out of existing sounds.
+	
+| Method  | Alias | Description                                   |
+|---------|-------|-----------------------------------------------|
+| <ic>pattack</ic>  | patt   | Attack time |
+| <ic>pdecay</ic>   | pdec   | Decay time |
+| <ic>psustain</ic> | psus   | Sustain value |
+| <ic>prelease</ic> | prel   | Release time |
+| <ic>penv</ic>    |       | Pitch envelope strength (positive or negative) |
+| <ic>panchor</ic>    |       | Envelope anchor range (0 - 1) |
+	
+Resume writing the pitch documentation here.
+
+`;
+};