Standardize code comment styling

[libutcher]

This MR standardizes the code comments to use more consistent styling. Changes include:

• Each code comment now begins with a third-person verb and ends with terminal punctuation.
• Function names in code comments now use code formatting.
• One long code comment from the previous edit describing the Auth function is now shorter and clearer.
• References to the WASM core now say "SDK core" instead, per Simon's comment here about not wanting to reveal to users what we're using under the hood, and instead consistently refer to the core as simply the "SDK core".
• Fixes one instance of passive voice: "It's sent to the WASM core.".

[libutcher]

@AndyTitu This MR updates the code comments to use more standard JS code comment styling, like we discussed on the call last week. I'll also have a style guide that documents these standards ready in the next few days. For now, all changes are described in the PR description.