Add suggestion to use --replace-all in case of table conflicts (#43557)

I suspect that some people are using `--replace` to import backups when they really want `--replace-all`.
This can lead to table conflict errors that would not happen in ReplaceAll mode.

GitOrigin-RevId: ba0fd7686c509c2b965a1e5068fbb6a8592158dd

Author: goffrie

crates/database/src/bootstrap_model/table.rs

@@ -386,7 +386,8 @@ impl<'a, RT: Runtime> TableModel<'a, RT> {
         } else {
             format!(
                 "New table `{table}`{in_component} has IDs that conflict with existing table \
-                 `{existing_table}`"
+                 `{existing_table}`. To delete all existing tables, import with `npx convex \
+                 import --replace-all`."
             )
         };
         ErrorMetadata::bad_request("TableConflict", msg)