feat: Initialize project structure

Sets up the basic project configuration for Cognitive Clarity. This includes:
- Initializing `package.json` with necessary dependencies (React, Gemini API, Lucide React) and build scripts for Vite.
- Creating a basic `index.html` with Tailwind CSS and Google Fonts integration.
- Setting up `index.tsx` as the React application entry point.
- Configuring `tsconfig.json` for TypeScript compilation with Vite.
- Establishing `vite.config.ts` for development server setup and environment variable handling.
- Adding a standard `.gitignore` file.
- Updating `README.md` with local run instructions and AI Studio links.
- Defining `metadata.json` for application details.
- Creating core type definitions in `types.ts`.
- Populating `constants.ts` with initial CBT glossary terms.
- Adding utility functions for audio processing in `services/audioUtils.ts`.

types.ts

@@ -0,0 +1,41 @@
+
+export interface Scenario {
+  id: string;
+  title: string;
+  description: string;
+  category: 'Social Anxiety' | 'Workplace' | 'Relationships' | 'Self-Talk';
+  difficulty: 'Beginner' | 'Intermediate' | 'Advanced';
+  systemInstruction: string;
+  initialMessage: string;
+  cbtFocus: string[];
+}
+
+export interface Message {
+  id: string;
+  role: 'user' | 'model' | 'system';
+  text: string;
+  timestamp: Date;
+  isAnalysis?: boolean; // If true, this is a CBT analysis, not part of roleplay
+}
+
+export type SessionMode = 'text' | 'voice';
+
+export interface AudioConfig {
+  sampleRate: number;
+}
+
+export interface AnalysisResult {
+  analysis: {
+    distortions: string[];
+    isAdaptive: boolean;
+    evidence: string;
+  };
+  rating: {
+    score: number;
+    reason: string;
+  };
+  suggestions: {
+    alternativeThought: string;
+    behavioralStep: string;
+  };
+}