Add Bink Video Container pattern

[XJDHDR]

Pattern

This pattern is for the Bink Video Container files that are frequently used for pre-rendered cutscenes in video games. I created this pattern from this file format specification.

• RAD Game Tools page
• Wikipedia

Checklist

• A pattern for this format doesn't exist yet (or this PR improves the existing one)
• The new pattern has been added to the relevant table in the Readme
• The new pattern has a description pragma (#pragma description My pattern Description here)
• The pattern was associated with all relevant MIME types (using #pragma MIME mime-type in the source code)
  • Make sure to never use application/octet-stream here as that means "Unidentifiable binary data"
• A test file for this pattern has been added to /tests/patterns/test_data
  • Try to keep this file below ~ 1 MB