chore: add proper documentation (#763)

* chore: generate API ref using `typedoc`

* chore: declutter readme and add links to ytjs.dev

* chore: clean up

docs/api/classes/HTTPClient.md

@@ -0,0 +1,71 @@
+[youtubei.js](../README.md) / HTTPClient
+
+# Class: HTTPClient
+
+## Constructors
+
+### new HTTPClient()
+
+> **new HTTPClient**(`session`, `cookie`?, `fetch`?): [`HTTPClient`](HTTPClient.md)
+
+#### Parameters
+
+• **session**: [`Session`](Session.md)
+
+• **cookie?**: `string`
+
+• **fetch?**
+
+#### Returns
+
+[`HTTPClient`](HTTPClient.md)
+
+#### Defined in
+
+[src/utils/HTTPClient.ts:23](https://github.com/LuanRT/YouTube.js/blob/eb21af33db708f0355f4fb15881f5d4fabc7b06c/src/utils/HTTPClient.ts#L23)
+
+## Accessors
+
+### fetch\_function
+
+> `get` **fetch\_function**(): (`input`, `init`?) => `Promise`\<`Response`\>
+
+#### Returns
+
+`Function`
+
+[MDN Reference](https://developer.mozilla.org/docs/Web/API/fetch)
+
+##### Parameters
+
+• **input**: `URL` \| `RequestInfo`
+
+• **init?**: `RequestInit`
+
+##### Returns
+
+`Promise`\<`Response`\>
+
+#### Defined in
+
+[src/utils/HTTPClient.ts:29](https://github.com/LuanRT/YouTube.js/blob/eb21af33db708f0355f4fb15881f5d4fabc7b06c/src/utils/HTTPClient.ts#L29)
+
+## Methods
+
+### fetch()
+
+> **fetch**(`input`, `init`?): `Promise`\<`Response`\>
+
+#### Parameters
+
+• **input**: `string` \| `URL` \| `Request`
+
+• **init?**: `RequestInit` & [`HTTPClientInit`](../interfaces/HTTPClientInit.md)
+
+#### Returns
+
+`Promise`\<`Response`\>
+
+#### Defined in
+
+[src/utils/HTTPClient.ts:33](https://github.com/LuanRT/YouTube.js/blob/eb21af33db708f0355f4fb15881f5d4fabc7b06c/src/utils/HTTPClient.ts#L33)