refactor!: welp, a lot of stuff

- Use the OS temp folder to cache the player, closes #57.
- Added support for editing channel name, closes #40.
- Added support for editing channel description.
- Added support for retrieving basic channel analytics, closes #54.
- Moved `Innertube#getAccountInfo()` to `Innertube#account`, and renamed it to `getInfo()`.
- `getInfo()` is now able to return email, channel id, etc.
- Improved jsdoc.

lib/core/SessionBuilder.js

@@ -7,6 +7,7 @@ const Utils = require('../utils/Utils');
 const Constants = require('../utils/Constants');
 const UserAgent = require('user-agents');
 
+/** @namespace */
 class SessionBuilder {
   #config;
   
@@ -18,6 +19,10 @@ class SessionBuilder {
   #context;
   #player;
   
+  /**
+   * @param {string} config
+   * @constructor
+   */
   constructor(config) {
     this.#config = config;
   }
@@ -42,6 +47,10 @@ class SessionBuilder {
     return this;
   }
   
+  /**
+   * Builds a valid context object.
+   * @returns
+   */
   #buildContext() {
     const user_agent = new UserAgent({ deviceCategory: 'desktop' });
     
@@ -70,6 +79,11 @@ class SessionBuilder {
     return context;
   }
   
+  /**
+   * Retrieves initial configuration such as keys, 
+   * client data, etc.
+   * @returns Promise.<object>
+   */
   async #getYtConfig() {
     const response = await Axios.get(`${Constants.URLS.YT_BASE}/sw.js_data`).catch((err) => err);
   
@@ -82,6 +96,10 @@ class SessionBuilder {
     return JSON.parse(response.data.replace(')]}\'', ''));
   }
   
+  /**
+   * Retrives the YouTube player id.
+   * @returns {Promise.<string>
+   */
   async #getPlayerId() {
     const response = await Axios.get(`${Constants.URLS.YT_BASE}/iframe_api`).catch((err) => err);
   
@@ -94,26 +112,32 @@ class SessionBuilder {
     return Utils.getStringBetweenStrings(response.data, 'player\\/', '\\/');
   }
   
+  /** @readonly */
   get key() {
     return this.#key;
   }
   
+  /** @readonly */
   get context() {
     return this.#context;
   }
   
+  /** @readonly */
   get api_version() {
     return this.#api_version;
   }
   
+  /** @readonly */
   get client_version() {
     return this.#client_version;
   }
   
+  /** @readonly */
   get client_name() {
     return this.#client_name;
   }
   
+  /** @readonly */
   get player() {
     return this.#player;
   }