Removed unused feature.

Optimized use statements in main.

Simplified truth_combinations code a little.

Updated OpenAPI spec

spec/response.tsp

@@ -0,0 +1,69 @@
+import "@typespec/http";
+import "./models.tsp";
+using TypeSpec.Http;
+using Models;
+
+namespace Responses;
+
+/**
+ * Returns a response as HTML, with the content type set to "text/html".
+ */
+@summary("Returns a response as HTML")
+model HTML {
+  @header contentType: "text/html";
+  @body _: string;
+}
+
+/**
+ * Information about this API.
+ */
+@summary("Information")
+model InfoResponse {
+  message: string;
+  docs: string;
+  createdBy: string;
+}
+
+/**
+ * If an expression is valid.
+ */
+@summary("If an expression is valid")
+model IsValidResponse {
+  isValid: boolean;
+}
+
+/**
+ * Response after simplifying an expression.
+ */
+@summary("Simplify Response")
+model SimplifyResponse {
+  @summary("Before simplification")
+  before: string;
+
+  @summary("After simplification")
+  after: string;
+
+  @summary("Steps taken to simplify")
+  operations: string[];
+
+  @summary("The simplified expression")
+  expression: Expression;
+}
+
+/**
+ * Response after generating a truth table.
+ */
+@summary("Truth Table Response")
+model TruthTableResponse {
+  @summary("The truth table")
+  truthTable: Models.TruthTable;
+}
+
+/**
+ * Response after simplifying an expression and generating a truth table.
+ */
+@summary("Simplify and Table Response")
+model SimplifyTableResponse {
+  ...SimplifyResponse;
+  ...TruthTableResponse;
+}