Parse date range with dashes

[alexz-sg]

Description

This PR addresses the issue with parsing date ranges when dateFormat contains dashes (-).

Problem
Currently, when entering a date manually via input using a dateFormat with dashes (such as dd-MM-yyyy), the startDate and endDate are not parsed correctly. The issue arises because the current parser uses .split('-'), which only captures parts of the first date.

Changes
This PR modifies the parser to use .split(' - ') as the default separator for date ranges. To avoid breaking changes, this adjustment is applied only to dateFormats that contain dashes.

Contribution checklist

• I have followed the contributing guidelines.
• I have added sufficient test coverage for my changes.
• I have formatted my code with Prettier and checked for linting issues with ESLint for code readability.