Add DFA-Simulator

[coderatul]

Pull Request Description:

• DFA-Simulator - A lightweight simulator for building and testing Deterministic Finite Automata with custom states and inputs.

What is this Python project?

• This library is awesome because it provides a straightforward way to simulate Deterministic Finite Automata, making it a valuable tool for learning and experimenting with computational theory.

Describe features.

• user friendly way of adding a Deterministic Finite automata
• Test whether a string belong to the language of DFA or not

What's the difference between this Python project and similar ones?

• user firendly way of inputing DFA
• support for NFA, PDA we'll be added soon in this project

Enumerate comparisons.

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