feat(wm): float placement configs

This commit adds a few more options to combine with the
`FloatingLayerBehaviour` which determine placement in different
situations:

- `"toggle_float_placement"`: the placement to be used by a floating
  window when it is forced to float with the `toggle-float` command.
- `"floating_layer_placement"`: the placement to be used by a floating
  window when it is spawned on the floating layer and the user has the
  floating layer behaviour set to float.
- `"floating_override_placement"`: the placement to be used by a window
  that is spawned when float override is active.
- `"float_rule_placement"`: the placement to be used by a window that
  matches a 'floating_applications' rule.

Each `Placement` can be one of the following types:

- "None": windows are spawned wherever Windows positions them with
  whatever size they had. Komorebi does not change its size or position.
- "Center": windows are centered without changing their size.
- "CenterAndResize": windows are centered and resized according to the
defined aspect ratio.

By default the placements are as follows:
- `"toggle_float_placement"`: `"CenterAndResize"`
- `"floating_layer_placement"`: `"Center"`
- `"floating_override_placement"`: `"None"`
- `"float_rule_placement"`: `"None"`

This commit also adds the `floating_layer_behaviour` as a global config.

schema.bar.json

@@ -1,7 +1,7 @@
 {
   "$schema": "http://json-schema.org/draft-07/schema#",
   "title": "KomobarConfig",
-  "description": "The `komorebi.bar.json` configuration file reference for `v0.1.36`",
+  "description": "The `komorebi.bar.json` configuration file reference for `v0.1.37`",
   "type": "object",
   "required": [
     "left_widgets",