feat: replace template view tabs with a filter pill

This commit replaces the Team/Organisation tabs on the templates page with a
FilterPill. The page uses the shared nuqs parsers for the view, page, and
perPage URL parameters. The documents page (#3145) uses the same components.
The e2e tests use the new filter test ID.

apps/remix/app/utils/templates-search-params.ts

@@ -0,0 +1,15 @@
+import { parseAsInteger, parseAsStringLiteral } from 'nuqs';
+
+export const TEMPLATES_VIEW_VALUES = ['team', 'organisation'] as const;
+
+/**
+ * Shared nuqs parsers for the templates page URL state.
+ *
+ * Used by the templates page and its filter components so every consumer
+ * parses and serialises the params identically.
+ */
+export const templatesSearchParams = {
+  view: parseAsStringLiteral(TEMPLATES_VIEW_VALUES),
+  page: parseAsInteger,
+  perPage: parseAsInteger,
+};