Upgrade python to 3.9 and add access embeddings script

[haydin505]

I am actively engaged in the development of knowledge embeddings utilizing ontologies. Following a thorough review of the article and codebase, I've identified several enhancements tailored for newcomers to seamlessly engage with the project.

Changes Made:

• Implemented a .gitignore file specifically designed for PyCharm users, enhancing version control for the development environment.
• Introduced the AccessEmbeddings.py script, simplifying result visualization for users.
• Resolved an issue related to directory problems causing errors when saving the embedding file.
• Included the Helis owl, ensuring its availability in the repository.
• Addressed compatibility challenges with the existing requirements files by creating a new customized requirements file. This modification also facilitated an upgrade to Python 3.9.

These adjustments aim to streamline the onboarding process for new contributors and enhance the overall usability of the repository.

Also, fixes #10, #7 and #15