chore(dialog,modal): create changeset

Author: marissahuysentruyt

.changeset/modern-chairs-sit.md

@@ -0,0 +1,23 @@
+---
+"@spectrum-css/dialog": major
+"@spectrum-css/modal": minor
+---
+
+S2 Takeover dialog
+
+This is the migration for the fullscreen/fullscreenTakeover dialog stories (these stories correspond to the "takeover dialog" in Figma). The Divider component support was removed in S2 standard dialog migration ([#2860](https://github.com/adobe/spectrum-css/pull/2860)). New and updated tokens are in place to update fullscreen/fullscreenTakeover dialog sizing, grid spacing, spacing in the header, and font sizes. Fullscreen/fullscreenTakeover dialogs do not support additional footer content or checkboxes (in comparison to the standard dialog).
+
+Takeover dialogs also support replacing text in the header and body areas with other components. This required an additional `.spectrum-Dialog-headerContentWrapper` element that should center whatever component/content within.
+
+Class names updated to match naming convention (remove hyphens and capitalize second word):
+`.spectrum-Dialog-header-content` > `.spectrum-Dialog-headerContent`
+`.spectrum-Dialog-footer-content` > `.spectrum-Dialog-footerContent`
+
+_New Mods_
+`--mod-takeover-dialog-grid-spacing`
+`--mod-takeover-dialog-spacing-header-content-gap`
+`--mod-takeover-dialog-title-font-size`
+
+Modal updates
+
+- Modal component now uses the updated margin token (`window-to-edge`) found in the takeover dialog design specs. This work also introduced `--spectrum-modal-takeover-window-to-edge`