chore: add changeset for kontena write surface

.changeset/sawala-kontena-write-surface.md

@@ -0,0 +1,26 @@
+---
+'@sawala/cli': minor
+'@sawala/mcp': minor
+---
+
+Add the Kontena write surface: schemas + entries CRUD and publish/unpublish.
+
+Both the `sawala` CLI and `sawala-mcp` server previously exposed only
+read-only Kontena commands. This release fills out the rest of the
+content workflow:
+
+- CLI: `sawala kontena schema {create,update,delete}` and
+  `sawala kontena entry {create,update,delete,publish,unpublish}`.
+  Body comes from `--file <path>` (or `-` for stdin) or inline
+  `--data <json>`. Destructive verbs prompt on a TTY and refuse without
+  `--yes` outside one. Both create/update support `--dry-run` to
+  validate without a round-trip.
+- MCP: eight new tools mirroring the CLI verbs. Delete tools require
+  `confirm: true` and carry `destructiveHint`/`irreversibleHint` for
+  host UIs. Entry CRUD transparently fetches the schema first to route
+  single vs collection — schema type stays an implementation detail of
+  the kontena worker, not the tool surface.
+
+Publish/unpublish target collection schemas in v1; single-type schemas
+go through `entry update --publish` with the locale supplied in the
+patch.