refactor: add comments to our temporary extractParams function

packages/playwright-ct-svelte/registerSource.mjs

@@ -34,10 +34,16 @@ function isObjectComponent(component) {
   return typeof component === 'object' && component && component.__pw_type === 'object-component';
 }
 
+// This is a temporary function for extracting parameters from the
+// current Playwright mount API to a format accepted by Svelte 5
 /** @type {( component: ObjectComponent ) => Record<string, any>} */
 function extractParams(component) {
   let {props, slots, on} = component;
 
+  // Svelte 5 is dropping support for the old slot implementation in
+  // exchange for prop-based snippets. They have to be of a certain
+  // type, though. To still support strings as slots for testing
+  // purposes, we want to convert a string to a Snippet.
   slots = Object.fromEntries(
     Object.entries(slots ?? {}).map(([key, snippet]) => {
       if(typeof snippet === "string") {
@@ -48,6 +54,9 @@ function extractParams(component) {
     })
   );
 
+  // To support the current Playwright CT "on" mounting API, we want
+  // to go through all event names and modify their names, as they
+  // will be used as standard component properties.
   on = Object.fromEntries(
     Object.entries(on ?? {}).map(([key, fn]) => {
       return [`on${key}`, fn]