refactor(parser): better jsdoc, some behavior fixes, more tests

— all operations on nodes moved to `createList` function
- fixed problem with single tags with value only like `[url=value]` fixes #6
- write tests for `Token` class
- moved all node arrays to parse func, now parser supports many instances
- add jsdoc to critical parts of the parser to better understanding how it works

packages/bbob-parser/src/Token.js

@@ -41,10 +41,6 @@ const getTagName = (token) => {
 const convertTagToText = (token) => {
   let text = OPEN_BRAKET;
 
-  if (isTagEnd(token)) {
-    text += SLASH;
-  }
-
   text += getTokenValue(token);
   text += CLOSE_BRAKET;