Improve form errors style

https://ombulabs.atlassian.net/browse/DT-261

**Branch/Commit:**

Main branch

**Describe the feature:**

As a user, if the creation of a Story fails, I want to see the error messages next to each field with an error.

**Problem:**

Currently, it looks outdated with a list of all the errors at the top, colors don't match the Point palette, style is kinda broken (the vignette of the list is outside the container)


**Mockups:**

Something like this maybe? using red-ish color from ombu logo

**I will abide by the [code of conduct](https://github.com/fastruby/points/blob/main/CODE_OF_CONDUCT.md)**