Revise installation instructions and package versions

installation.md

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+Installation Guide: 
+
+This document provides detailed system requirements and step-by-step instructions to build and install LexAI on macOS.
+
+System Requirements: 
+- **Operating System** | macOS 12.0 (Monterey) or newer |
+- **Processor** | Apple Silicon (M1/M2/M3) |
+- **Internet Connection** | Required for API calls and Firebase services |
+- **Xcode** | 14.0+ | [Mac App Store](https://apps.apple.com/us/app/xcode/id497799835)
+- **Python** | 3.9+ | [python.org](https://www.python.org/downloads)
+- **Git** | Latest | [git-scm.com](https://git-scm.com)
+- **Firebase Account** | Free tier | [firebase.google.com](https://firebase.google.com)
+
+Supported MacOS Versions:
+- macOS 12 (Monterey)
+- macOS 13 (Ventura)
+- macOS 14 (Sonoma)
+- macOS 15 (Sequoia)
+
+Pre-installations: 
+Step 1: Xcode
+Step 2: node.js | https://nodejs.org/en/ 
+Step 3: Git | https://git-scm.com/downloads
+Step 4: Python 3.9+ | python.org/downloads
+Step 5: Request to be added as a FireBase project member and download the GoogleService-Info.plist
+
+Instructions to build and Install the Software
+Step 1: Verify you have all prerequisite and pre-installations to build the project.
+Step 2: Clone the repository | https://github.com/WSU-4110/LexAI.git
+- In Command Prompt/Terminal
+      git clone https://github.com/WSU-4110/LexAI.git
+      cd LexAI
+Step 3: Open XCode.
+Step 4: Drop the GoogleService-Info.plist into the LexAI_IOS main folder 
+Step 5: Install Python Dependencies
+- Navigate to backend directory
+cd backend
+
+- Create a virtual environment (recommended)
+python3 -m venv venv
+
+- Activate the virtual environment
+source venv/bin/activate
+
+- Install required packages
+pip3 install requests>=2.31.0
+pip3 install python-dotenv
+pip3 install firebase-functions>=0.1.0
+pip3 install firebase-admin>=6.0.0
+pip3 install pinecone>=5.0.0
+pip3 install json5
+pip3 install PyPDF2
+
+- If a requirements.txt file exists, use:
+- pip3 install -r requirements.txt
+
+- Deactivate the virtual environment when done
+deactivate
+
+Step 6: Locate the "Build" button on the top of the screen of XCode and press it to build the application.
+Step 7: Locate the "Run" button on the top of the screen of XCode and press it to run the application.