Major 2.0 (#20)

* New 2.0 version + DependencyInjection library

* Updated docs and repo settings (devcontainers, vscode, github, etc.)

* Added tests

* Fixed bugs

* Minor test project refactoring

* Updated projects
- Added symbol packages
- Updated package versions to pre-release

* Updated SECURITY.md

* Added GitHub Actions workflows

libraries/SimpleOTP/OtpType.cs

@@ -0,0 +1,22 @@
+namespace SimpleOTP;
+
+/// <summary>
+/// Represents the type of One-Time Password (OTP).
+/// </summary>
+public enum OtpType
+{
+	/// <summary>
+	/// Time-based One-Time Password (TOTP).
+	/// </summary>
+	/// <remarks>
+	/// <a href="https://tools.ietf.org/html/rfc6238">RFC 6238</a>
+	/// </remarks>
+	Totp = 0,
+	/// <summary>
+	/// HMAC-based One-Time Password (HOTP).
+	/// </summary>
+	/// <remarks>
+	/// <a href="https://tools.ietf.org/html/rfc4226">RFC 4226</a>
+	/// </remarks>
+	Hotp = 1
+}