Add new project Obs-studio project

[marcellomaugeri]

Initialise the OBS Studio project, including an initial build and an initial fuzz driver.

Note that, due to the base image being built in Ubuntu 20.04, I had to resolve some broken dependencies, such as those relating to ffmpeg and Qt6. Once #13018 has been closed, I will fix this build accordingly.

Please note that this pull request has been opened as a draft due to missing OBS maintainer emails. I am contacting them to obtain their approval and email addresses, so that I can continue with the integration by adding new fuzz drivers. EDIT: primary_contact added

[github-actions[bot]]

marcellomaugeri is integrating a new project:
- Main repo: https://github.com/obsproject/obs-studio/
- Criticality score: 0.62630