[Doc] Add JSDoc linter & general comment clean up (#611)

- Prefer comments above lines over end-of-line comments
  - Makes auto-formatting easier
  - Subjective, but it is generally easier to read in JS
- Standardises JSdoc format
- Auto-fixes for many issues (applies on save w/ESLint extension)

src/LLink.ts

@@ -73,7 +73,8 @@ export class LLink implements LinkSegment, Serialisable<SerialisableLLink> {
     this.parentId = parentId
 
     this._data = null
-    this._pos = new Float32Array(2) // center
+    // center
+    this._pos = new Float32Array(2)
   }
 
   /** @deprecated Use {@link LLink.create} */