Feature/8097 get camera function

[ombalgude]

Resolves #8097

Changes:
This pull request introduces a new joint getter/setter function, activeCamera(), to the p5.RendererGL.prototype to standardize how the active camera is accessed and modified.

1. New activeCamera() function:

• When called with no arguments (activeCamera()), it acts as a getter and returns the current camera object.
• When called with a camera object (activeCamera(myCam)), it acts as a setter for the active camera.

2. Deprecated setCamera():

• The existing setCamera() function is now deprecated.
• For backward compatibility, it continues to function by calling the new activeCamera() internally.
• These changes align with the common p5.js pattern of using joint getter/setter functions and improve the consistency of the WebGL API.

PR Checklist

• npm run lint passes
• Inline reference is included / updated
• Unit tests are included / updated

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Thank You!

[perminder-17]

Sorry for the delay in review, For the next time feel free to tag me on the PRs I can help reviewing them.

Actually, If we are thinking to add the activeCamera as a public API, so user can access it in sketch.js. But, here you only added it on RendererGL, not on the public p5 API (fn.activeCamera). Sketches won’t be able to call activeCamera() directly? What you think?