Add Cisco theme

[thommorais]

This PR adds the a simple theme.

[maxdeviant]

@thommorais It looks like there are some issues with the structure of your theme files.

This is not a valid theme file: https://github.com/thommorais/zed-cisco-theme/blob/9a2b1ca50848095c6ef07649b37b504c06b71a06/themes/cisco-dark.json

And this theme file is empty: https://github.com/thommorais/zed-cisco-theme/blob/9a2b1ca50848095c6ef07649b37b504c06b71a06/themes/base.json

Here's an example of what the theme files should look like: https://github.com/zed-industries/zed/blob/70b1e0eec0f4118c15d908636b9a38591dcf43ea/assets/themes/one/one.json

[thommorais]

@thommorais It looks like there are some issues with the structure of your theme files.

This is not a valid theme file: https://github.com/thommorais/zed-cisco-theme/blob/9a2b1ca50848095c6ef07649b37b504c06b71a06/themes/cisco-dark.json

And this theme file is empty: https://github.com/thommorais/zed-cisco-theme/blob/9a2b1ca50848095c6ef07649b37b504c06b71a06/themes/base.json

Here's an example of what the theme files should look like: https://github.com/zed-industries/zed/blob/70b1e0eec0f4118c15d908636b9a38591dcf43ea/assets/themes/one/one.json

Apologies—I forgot to build the theme, so the files you mentioned were in there bacause I plan to create a light version in the future, but for now, I’ve deleted them and added the build version to the root directory

[maxdeviant]

@thommorais I think we're almost there.

This theme file needs to be inside of a themes directory: https://github.com/thommorais/zed-cisco-theme/blob/687bc688e073627ae88881aa6be4af60c736719c/cisco-theme.json