Add Postfix Completion support

[Dreamtrail]

Please add Postfix Completion support. This feature allows developers to transform expressions quickly using postfix templates, enhancing coding efficiency.

Key benefits:

1. Increased Productivity: Quickly insert logging statements with minimal keystrokes.
2. Consistency: Use predefined templates for consistent logging practices.
3. Ease of Use: Simplifies the logging process, reducing errors.

Examples of useful templates:

• .logi to wrap an expression with a logging statement.
• .logw, .loge, etc., for specific log levels.

For more details on Postfix Completion, refer to the IntelliJ IDEA documentation.

Thank you for considering this feature request.