Light theme proposal

[lilacse]

I always found that Pororoca's light theme felt more like a "gray" theme instead. So, taking inspiration from other tools (mainly Insomnia), I put together some colours that resulted in a theme that looks like this:

I'm hoping to contribute this theme to the project, but I'm not sure what to call it as, since personally I treated it as the "light theme", but we currently already have a theme called Light.

Apart from the name, I'm also open to suggestions to the theme before I commit and try to PR it :)

Thanks!

[alexandrehtrb]

Hello!

Your theme looks good! We can add it as a new "Light 2" theme. Feel free to open a PR!