add toKebabCase

snippets/toKebabCase.md

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+### toKebabCase
+
+Converts a string to snakecase.
+Use `replace()` to add spaces before capital letters, convert `toLowerCase()`, then `replace()`  and undesrsocres and spaces with hyphens.
+Also check if a string starts with hyphen and if yes remove it.
+
+```js
+const toKebabCase = str => {
+    str = str.replace(/([A-Z])/g," $1").toLowerCase().replace(/_/g,' ').replace(/-/g,' ').replace(/\s\s+/g, ' ').replace(/\s/g,'-');
+    return str.startsWith('-') ? str.slice(1,str.length) : str;
+}
+// toKebabCase("camelCase") -> 'camel-case'
+// toKebabCase("some text") -> 'some-text'
+// toKebabCase("some-javascript-property") -> 'some-javascript-property'
+// toKebabCase("some-mixed_string With spaces_underscores-and-hyphens") -> 'some-mixed-string-with-spaces-underscores-and-hyphens'
+// toKebabCase("AllThe-small Things") -> "all-the-small-things"
+```