Add BitDive to Testing > Frameworks section

[turmyshevd]

Added BitDive to the Testing > Frameworks section.

Unique selling point: Automatically generates integration tests by capturing runtime application behavior - no test code required. Unlike traditional testing frameworks that require manual test writing, BitDive observes actual method executions, HTTP calls, and database queries to create realistic tests.

Commercial: Yes, with free tier available. Clear pricing at https://bitdive.io/pricing

Documentation: https://bitdive.io/docs/getting-started/