This implements more of the text rendering and a clock was the easiest
part. I still need to add the tag bit. I'd also like to hide the tags
but still show the clock like beanclock when windows are fullscreened
This uses KDL properties, i.e. "host=<hostname>" and can be applied to
any config type. An example is includes in examples/config.kdl.
```kdl
wallpaper_image_path "~/Pictures/desktop.png" host="desktop"
wallpaper_image_path "~/Pictures/laptop.png" host="laptop"
```
Right now, the support is still incomplete (no way to set config) but
we get the devices and set them up and handle current/support events
for the river_libinput_device_v1 devices.
Added pixman and zigimg dependencies
Set up in build.zig, added to both exe and exe_check
Add new protocols:
river-layer-shell-v1
wlr-layer-shell-unstable-v1
xdg-shell (dep of wlr-layer-shell-unstable-v1)
Update Context.zig to hold wl_output, wl_shm, and a WallpaperImage
Also re-ordered all of its fields into alphabetical order
Context.create() now takes a Context.Options struct so that it takes
one arg instead of many smaller args.
Added new WallpaperImage.zig, but it's not yet actually used
Keybinds go in a "keybinds" block and follow the format
<command> <modifiers> <keysym> <options>
But there's also a special "tag_bind" command that just takes modifiers
and one of set_output_tags, set_window_tags, toggle_output_tags, and
toggle_window_tags. It will automatically be used to loop through the
1-9 keys on tags 1<<0 to 1<<9, however, you can still implement those
commands individually if you want.
Config goes in $XDG_CONFIG_HOME/beansprout/config.kdl or
$HOME/.config/beansprout/config.kdl
Config is in the kdl format. Right now, the supported options are
```zig
/// Width of window borders in pixels
border_width: u8 = 2,
/// Color of focused window's border in 0xRRGGBBAA or 0xRRGGBB form
border_color_focused: RiverColor = utils.parseRgbaComptime("0x89b4fa"),
/// Color of uffocused windows' borders in 0xRRGGBBAA or 0xRRGGBB form
border_color_unfocused: RiverColor = utils.parseRgbaComptime("0x1e1e2e"),
/// Where a new window should attach, top or bottom of the stack
attach_mode: AttachMode = .top,
/// Should focus change when the cursor moves onto a new window
focus_follows_pointer: bool = true,
/// Should the pointer warp to the center of newly-focused windows
pointer_warp_on_focus_change: bool = true,
```
I plan to add Keybinds shortly. If parsing the configuration fails,
the default config will be used and the WM will continue loading.
