chore: add changesets for 0.3.0 release (#13)

- minor: auto-resolve SSO provider icons via simple icons
- patch: wrap button and option text when content overflows

Author: masnwilliams

.changeset/auto-resolve-sso-icons.md

@@ -0,0 +1,5 @@
+---
+"@onkernel/managed-auth-react": minor
+---
+
+Auto-resolve SSO provider icons via the Simple Icons CDN. `getSSOProviderInfo` now slugifies any provider key and renders its brand icon from `https://cdn.simpleicons.org/<slug>`, with a circular letter-avatar fallback when the icon fails to load. Removes the hardcoded `GoogleMark` / `GitHubMark` / `GitLabMark` / `MicrosoftMark` / `FacebookMark` / `AppleMark` SVGs in favor of the generic resolver, so new providers render out of the box without library changes. Non-brand keys (`passkey`, `sso`, `saml`) keep their built-in icons.

.changeset/wrap-button-overflow.md

@@ -0,0 +1,5 @@
+---
+"@onkernel/managed-auth-react": patch
+---
+
+Wrap button and option text when content overflows. `.kma-button` previously used `white-space: nowrap` and a fixed `height`, so long MFA / SSO / sign-in option labels clipped past the card on narrower viewports. Switched to `min-height` plus `overflow-wrap: anywhere` so labels wrap and the row grows to fit, and added `padding` + `min-width: 0` on `.kma-sso-button` so its label can shrink.