* add option `theme` that allows for setting of a theme,
the default is `default`
* under `themes` the themes can be described as follows:
either:
```
themes:
default:
fg: [0,0,0]
bg: [0,0,0]
black: [0,0,0]
red: [0,0,0]
green: [0,0,0]
yellow: [0,0,0]
blue: [0,0,0]
magenta: [0,0,0]
cyan: [0,0,0]
white: [0,0,0]
orange: [0,0,0]
```
or
```
themes:
default:
fg: 0
bg: 0
black: 0
red: 0
green: 0
yellow: 0
blue: 0
magenta: 0
cyan: 0
white: 0
orange: 0
```
If the key is different from default, it needs to either be specified on
start with `options --theme [THEME]`, or in the configuration file under
theme: [THEME].
closes#390
* If starting in the locked mode after the merge,
the locked mode seems to need 2 actions to go to
the normal mode - after that everything works
as expected.
- This is not intended.
* Parsing Implemented
* Adds option to specify a default mode
either through a flag `--options default-mode [MODE]`,
or a configuration option `default_mode: [MODE]`
closes#368
* the simplified layout omits the Nerdfonts characters that are not
found in every Fontset
* add an optional config option to opt into the simplified ui
`simplified_ui: bool`
* add a config flag that allows opting into the simplified ui
`zellij options --simplified-ui`
* move the `clean` flag to the `setup` subcommand
