blog: add lvgl plus PPA.

[uLipe]

Initially, please let me know if I'm missing something, I read the guidelines but this is my first PR to the developer portal.

Description

Since the LVGL 9.4 has been released it now features the PPA draw unit, which works with the software
render and accelerates fill and image blending tasks, this PR adds an article telling about this integration and
how to use it.

Related

Testing

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[github-actions]

🎉 A preview for this PR is available at: https://preview-developer.espressif.com/pr597/

[espzav]

I am not sure, if this is a good code for example. This is from BSP and you need to use BSP for using this (but BSP is optional above).
The second point, this code using HDMI from BSP and this is not good as example. Better is to use some LCD from EV board for explanation.
The third, in example shouldn't be #if.

[pedrominatel]

Hi @uLipe, thank you for your contribution.
I would like to suggest some changes to the article's structure.

The current structure, in blocks, looks more like a slide presentation. My suggestion is to change to a narrative prose, in a way that you will show the readers your perspective.
If you don't mind, we can propose a version where most of the bullet points could be converted to narrative.

What do you think?

[f-hollow]

@uLipe We will close this PR for now.

If and once you have a chance, feel free to implement the review comments and reopen this PR.