TextArea - add missing events

[thrbnhrtmnn]

Description / User Story

The TextArea should at least have the following events:

• onChange > blrChange
• onFocus > blrFocus
• onSelect > blrSelect
• onBlur > blrBlur

The events should be implemented similar to how it is currently already done for Checkbox, TextButton and IconButton. You can also see how the events are working in the vanilla js example application.

One finding we had there was that the events can not have the same name as the html events.

---

Acceptance Criteria

• blrChange event was implemented
• blrFocus event was implemented
• blrSelect event was implemented
• blrBlut event was implemented
• Props Excel has been updated / comments have been resolved and props changed from red to black font color > @thrbnhrtmnn or @angelicahoyss cab support here

---

Background information

• Link to props documentation (consider All Props page & Component page)