Button2 – Part1 (#3420)

## TODO

- [x] Remove `InteractionState`
- [ ] `Selectable` should use `Selection` instead of a boolean
- [x] Clean out ui2 prelude
- [ ] Build out button2 button types
- [ ] Port old buttons

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <1486634+maxdeviant@users.noreply.github.com>

crates/ui2/src/prelude.rs

@@ -3,62 +3,9 @@ pub use gpui::{
     ViewContext, WindowContext,
 };
 
+pub use crate::clickable::*;
+pub use crate::fixed::*;
+pub use crate::selectable::*;
 pub use crate::StyledExt;
 pub use crate::{ButtonVariant, Color};
 pub use theme::ActiveTheme;
-
-use strum::EnumIter;
-
-#[derive(Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, EnumIter)]
-pub enum IconSide {
-    #[default]
-    Left,
-    Right,
-}
-
-#[derive(Default, PartialEq, Copy, Clone, EnumIter, strum::Display)]
-pub enum InteractionState {
-    /// An element that is enabled and not hovered, active, focused, or disabled.
-    ///
-    /// This is often referred to as the "default" state.
-    #[default]
-    Enabled,
-    /// An element that is hovered.
-    Hovered,
-    /// An element has an active mouse down or touch start event on it.
-    Active,
-    /// An element that is focused using the keyboard.
-    Focused,
-    /// An element that is disabled.
-    Disabled,
-    /// A toggleable element that is selected, like the active button in a
-    /// button toggle group.
-    Selected,
-}
-
-impl InteractionState {
-    pub fn if_enabled(&self, enabled: bool) -> Self {
-        if enabled {
-            *self
-        } else {
-            InteractionState::Disabled
-        }
-    }
-}
-
-#[derive(Debug, Default, PartialEq, Eq, Hash, Clone, Copy)]
-pub enum Selection {
-    #[default]
-    Unselected,
-    Indeterminate,
-    Selected,
-}
-
-impl Selection {
-    pub fn inverse(&self) -> Self {
-        match self {
-            Self::Unselected | Self::Indeterminate => Self::Selected,
-            Self::Selected => Self::Unselected,
-        }
-    }
-}