feat(scaffolder): config-driven template groups and swappable TemplateCard (#34147)

* feat(scaffolder): config-driven template groups and swappable TemplateCard

Signed-off-by: benjdlambert <ben@blam.sh>

* refactor(scaffolder): keep createGroupsWithOther internal

Signed-off-by: benjdlambert <ben@blam.sh>

* docs(scaffolder): fix sub-page extension ID in changeset

Signed-off-by: benjdlambert <ben@blam.sh>

* address PR review feedback

Signed-off-by: benjdlambert <ben@blam.sh>

* split TemplateCard swappable contract from legacy props

Signed-off-by: benjdlambert <ben@blam.sh>

* address review feedback: dedupe tags, defensive groups copy, doc clarifications

Signed-off-by: benjdlambert <ben@blam.sh>

* regenerate api reports

Signed-off-by: benjdlambert <ben@blam.sh>

* align docs and changeset with actual default group titles

Signed-off-by: benjdlambert <ben@blam.sh>

* regen api reports after rebase

Signed-off-by: benjdlambert <ben@blam.sh>

---------

Signed-off-by: benjdlambert <ben@blam.sh>

yarn.lock

@@ -7060,6 +7060,7 @@ __metadata:
     "@backstage/core-plugin-api": "workspace:^"
     "@backstage/dev-utils": "workspace:^"
     "@backstage/errors": "workspace:^"
+    "@backstage/filter-predicates": "workspace:^"
     "@backstage/frontend-plugin-api": "workspace:^"
     "@backstage/frontend-test-utils": "workspace:^"
     "@backstage/integration": "workspace:^"