source-marketstack contribution from ombhardwajj

[ombhardwajj]

This closes #47389

What

This PR adds a new connector for source Marketstack (source-marketstack).

Contributor-provided connector description:

Marketstack provides data from 72 global stock exchanges.
Using this connector we can extract Historical Data , Splits and Dividends data !
Docs : https://marketstack.com/documentation

Details

Expand for list of spec properties and streams

Configuration

Input	Type	Description	Default Value
api_key	string	API Key.
from	string	From.
to	string	To.

Streams

Stream Name	Primary Key	Pagination	Supports Full Sync	Supports Incremental
Exchanges	mic	DefaultPaginator	✅	❌
Tickers	symbol	DefaultPaginator	✅	❌
Historical Data		DefaultPaginator	✅	❌
Splits		DefaultPaginator	✅	❌
Dividends		DefaultPaginator	✅	❌

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[vercel]

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