Add List transcripts support

[ploeber]

• Add classmethod Transcript.list(), and Transcript.list_async() (similar to get_by_id)
• support all params from here https://www.assemblyai.com/docs/api-reference/transcript#list-transcripts
• Add support for pagination by adding a next_page_url parameter (Note: The Node SDK takes either params or a url, no combination)

[leotulipan]

for now I am doing the inelegant

           url = "https://api.assemblyai.com/v2/transcript"
            headers = {
                "Authorization": os.getenv("ASSEMBLY_AI_KEY")
            }

            response = requests.get(url, headers=headers)

            data = response.json()
            
            for i, transcript in enumerate(data["transcripts"]):
               # processing here

[ploeber]

Yup, that's the perfect way to do it with requests, thanks for sharing! We're aiming to ship SDK support for this next week :)