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/namespaces/Utils/functions/hasKeys.md

@@ -0,0 +1,25 @@
+[youtubei.js](../../../README.md) / [Utils](../README.md) / hasKeys
+
+# Function: hasKeys()
+
+> **hasKeys**\<`T`, `R`\>(`params`, ...`keys`): `params is Exclude<T, R[number]> & Required<Pick<T, R[number]>>`
+
+## Type Parameters
+
+• **T** *extends* `object`
+
+• **R** *extends* keyof `T`[]
+
+## Parameters
+
+• **params**: `T`
+
+• ...**keys**: `R`
+
+## Returns
+
+`params is Exclude<T, R[number]> & Required<Pick<T, R[number]>>`
+
+## Defined in
+
+[src/utils/Utils.ts:167](https://github.com/LuanRT/YouTube.js/blob/eb21af33db708f0355f4fb15881f5d4fabc7b06c/src/utils/Utils.ts#L167)