You have a few different questions here, so let's break it into pieces:
- I mean will be possible someday to create animals that are sentient and as intelligent as humans with Genetic Engineering?
That has been explored by many sci-fi authors. One example that comes to mind are the elephants in Alastair Reynolds' Poseidon's Children trilogy. Will it be possible? Nobody knows for sure. But it is a common enough theme that it seems reasonable to use it in your own world.
- And humanoid animals that walk,
humanoid animals is potentially very complex. If we start with primates - e.g., uplift a chimpanzee to "sentient" status - then this makes sense. But while we don't come close to understanding the complexities of the brain - i.e., what makes humans sentient - my feeling is that the genetic engineering needed to do that, provided it is possible, would actually be much less work than taking a non-humanoid animal and making it humanoid (walk erect, head on top, two working limbs, two walking limbs) as that would require both brain work AND changes to change the body layout which affects all systems - bone structure, muscles, circulatory, etc. Humanoids make sense on Star Trek and can be justified via panspermia but from a genetic engineering standpoint they're just too much work. Better to take a physically functioning dolphin or whale or elephant or spider and just "add intelligence". But if an animal already walks, then an uplifted animal would still walk - like the dog, elephant, chimpanzee, spider or whatever else it is based on.
Sure. Once you have the intelligence/sentience taken care of, all you need is some organ that can produce human speech frequencies, or add an electronic converter for human interaction.
I think any pet owner, veterinarian or zoo-keeper will tell you animals already have personality
That is a job for governments, not scientists. Consider that in many places, at many times, humans have not all had "rights like people" based on ancestry, religion or skin color.
- If so, what would they be called?
That is entirely up to you in your world.