[FEATURE] Add Regex Pattern for Date (DD/MM/YYYY)

1. Request Type

Select the appropriate request type:

• ✨ Feature Request

---

2. General Description

Clearly and thoroughly describe the purpose of this Issue (the problem, idea, or improvement).

Add a new regex pattern to validate dates in the format DD/MM/YYYY. This will allow users to test and generate regular expressions for common date inputs used in Brazil and other regions that follow this format.

---

3. Specific Information

✨ For a Feature

• Problem to Solve: What user or project need does this feature address? Currently, the project does not include a regex option for validating date formats. Users who need to test or generate expressions for dates (e.g., form validation or input masks) would benefit from having this built-in.

• Suggested Solution: How should the solution work? _Add a new category named "Date (DD/MM/YYYY)" in the regex generator.

---

5. Labels and Task Assignment

Suggest applicable labels for this issue and mention the maintainer to assign the task.

Labels : feature, hacktoberfest, regex

Hey @priscillatrevizan, please assign this task to me so I can work on it.