v0.3 Release

Apply clean code principles and fix all warnings

• Unified tracker and handler patterns with consistent interfaces
• Extracted methods following Single Responsibility Principle
• Added comprehensive JavaDoc documentation
• Fixed all IntelliJ warnings (null checks, always true conditions)
• Improved error handling and null safety
• Converted magic numbers/strings to constants
• Enhanced code readability and maintainability

For more information read project page https://github.com/sheduxdev/ExtraPlaceholders

v0.2 Release

For more information read project page https://github.com/sheduxdev/ExtraPlaceholders

v0.1 Release

For more information read project page https://github.com/sheduxdev/ExtraPlaceholders