Add Text Inputs for Twitch Chatbot Settings

[Bonifatius94]

Tesseract Root Directory:

• add a text input showing the Tesseract root directory (make it editable)
• put a button next to it for picking the directory via file explorer (at the righthand side)

Twitch Chatbot Name:

• add a plain text input, nothing fancy

Twitch API Token:

• add a password text input for the Twitch API token
• Tkinter password text input works like this: https://stackoverflow.com/questions/2416486/how-to-create-a-password-entry-field-using-tkinter
• ensure the token is not leaked in case the streamer accidentally shares the settings screen on Twitch

Validation (Optional):

• add a button at the bottom for testing the connection
• add another button next to it for validating whether the Tesseract path is correct