文本大小写转换器

UPPERCASE HELLO WORLD lowercase hello world Title Case Hello World Sentence case Hello world camelCase helloWorld PascalCase HelloWorld snake_case hello_world kebab-case hello-world CONSTANT_CASE HELLO_WORLD dot.case hello.world tOGGLE cASE hELLO wORLD aLtErNaTiNg HeLlO WoRlD