v1.0.0 The first formal version of RickRoll programming language

Dear contributors, outside collaborators, and advisors:
Thank you for your elaborate work, meritorious contribution, and brilliant ideas to this project!
The testing period of the Rick Roll programming language is ended officially since this momentous and memorable moment!
Congratulations! 🎉🎊🎉^_^
From now on, all of the keywords and statements will be kept constant.

After this significant update, we still have numerous works to achieve or improve:

1. Add more keywords and built-in functions
2. Write algorithms in Rick Roll Lang and upload them to the examples folder.
3. Make syntax highlights for VS Code and Sublime
4. Enhance the current audio generator
5. Improve the interpreter
6. Support writing code by singing

Thanks to
@StepfenShawn
@AcaiBerii
@henriqueritter
@Lemonix-xxx
@cxk-bugsfly