feat: add 404 page

[pedrofp4444]

This PR intends to implement the 404 error page in the application. To do so, I had to change temporarily the file dev.exs to not show debug detail errors:

 - debug_errors: true,
 + debug_errors: false,

As there's no theme setup yet I opted to use the default Button component from shadcn-vue so that it changes automatically when we change the default theme.

[ruilopesm]

SVG logo is not loading.

[GuilhermePSF]

21:9

16:9

Even tough my screen is quite wide, I still think that the content is quite small for a regular 1920×1080 16:9. Scale it enough, so everything is readable and easy to understand.

[pedrofp4444]

Even tough my screen is quite wide, I still think that the content is quite small for a regular 1920×1080 16:9. Scale it enough, so everything is readable and easy to understand.

Are you saying that I should use bigger lettering fonts or increment the space among elements? I used the default ones from tailwind. 😅

[GuilhermePSF]

Even tough my screen is quite wide, I still think that the content is quite small for a regular 1920×1080 16:9. Scale it enough, so everything is readable and easy to understand.

Are you saying that I should use bigger lettering fonts or increment the space among elements? I used the default ones from tailwind. 😅

TLDR for my last comment:

its too small make it bigger, more like this:

1920x1080