Feature/assign identity cards

[linycken013127]

Why Need This Change? / Root Cause:

The current function for assigning identity cards cannot handle situations outside of three people. There needs to be a comprehensive way to deal with cases involving three to nine people and other scenarios.

Changes Made:

• Adjusted the AssignIdentityCards function to handle three to nine people.
• Added unit tests for the AssignIdentityCards function.

Test Scope / Change Impact:

Testing for creating games should return an error for situations involving three to nine people and beyond.

Issue:

• 分配身份牌要支援3~9人 #116