Add "Ctrl + /" and "Shift + Ctrl + /" to insert today's date and time

[amedora]

Description

Added new shortcuts:

• Ctrl+/ to inserts today's date
• Shift+Ctrl+/ to inserts today's date & time

Issue fixed

• Insert Date, Time, etc #1765

Type of changes

• ⚪ Bug fix (Change that fixed an issue)
• ⚪ Breaking change (Change that can cause existing functionality to change)
• ⚪ Improvement (Change that improves the code. Maybe performance or development improvement)
• 🔘 Feature (Change that adds new functionality)
• ⚪ Documentation change (Change that modifies documentation. Maybe typo fixes)

Checklist:

• 🔘 My code follows the project code style
• ⚪ I have written test for my code and it has been tested
• ⚪ All existing tests have been passed
  • got error when "npm run test" on Windows environment.
• 🔘 I have attached a screenshot/video to visualize my change if possible

[ZeroX-DG]

LGTM 🎉