Feature/api server

[ArmanShirzad]

This pull request migrates the project from a desktop GUI application to a modern, containerized FastAPI web API for compiling LaTeX files to PDF. It introduces Docker support, a GitHub Actions workflow for automated image publishing, and a new RESTful endpoint for LaTeX compilation. The codebase is simplified by removing all GUI-related files and logic, focusing solely on API-based PDF generation.

The most important changes are:

API and Backend Refactor:

• Replaced the entire GUI-based application with a FastAPI server in main.py, exposing a /compile endpoint for LaTeX-to-PDF conversion, supporting both .tex files and supplementary assets. The new implementation uses temporary directories for isolated, secure compilation and returns the generated PDF as a response.
• Removed all desktop GUI code and dependencies, including customtkinter, converting.py, and env_setup.py, as well as the Mac/Windows packaging script setup.py. [1] [2] [3]

Containerization and Deployment:

• Added a Dockerfile to build a minimal Python 3.11-based image with TeX Live and all Python dependencies, exposing port 80 for the API.
• Added a .dockerignore file to exclude unnecessary files from the Docker build context, such as .git, virtual environments, and OS-specific files.

Continuous Integration / Delivery:

• Introduced a GitHub Actions workflow (.github/workflows/docker-publish.yml) to automatically build and publish the Docker image to GitHub Container Registry (GHCR) on pushes and pull requests to main.

Documentation:

• Updated README.md to reflect the new API-centric workflow, including Docker usage, API testing instructions, and removal of desktop-application-specific content.