add simple-qasm code

qasm-impl/simple/readme.md

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+# SIMPLE-QASM
+
+## Description
+
+This QASM (Quantum Assembly Language) code is a simple quantum circuit written for a two-qubit system. It applies the Hadamard gate to the first qubit (`q[0]`) and then performs a controlled-NOT (CNOT) gate with `q[0]` as the control qubit and `q[1]` as the target qubit.
+
+## Prerequisites
+
+- This code assumes you have a quantum simulator or quantum hardware platform that supports QASM and the gates used in the code, namely the Hadamard gate (H) and the controlled-NOT (CX) gate.
+- Ensure that you have included the standard quantum library `qelib1.inc`, which provides definitions for common quantum gates.
+
+## Usage
+
+1. Load the QASM file into your quantum simulator or quantum hardware platform.
+2. Run the simulation or execute the circuit on the quantum hardware.
+
+## Circuit Details
+
+- **Quantum Register**: `q[2]` declares a quantum register with two qubits.
+- **Hadamard Gate (H)**: Applied to `q[0]`, it creates a superposition of states, putting the qubit in a state of equal probability of being measured as 0 or 1.
+- **Controlled-NOT Gate (CX)**: Applied with `q[0]` as the control qubit and `q[1]` as the target qubit, it flips the state of the target qubit if the control qubit is in state |1⟩.
+
+## Example
+
+Suppose `q[0]` is initialized to |0⟩ and `q[1]` is initialized to |0⟩. After applying this circuit:
+
+- `q[0]` will be in a superposition of states (|0⟩ + |1⟩) / √2.
+- `q[1]` will be in the same state as `q[0]`, as a result of the controlled-NOT gate.

qasm-impl/simple/simple.qasm

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+include "qelib1.inc";
+qreg q[2];
+
+h q[0];
+cx q[0],q[1];