Add Business Central vendors to Ramp without re-keying

**Objective:** Find active Business Central vendors matching `{vendor-name}` (default: all, up to 50) that are missing from Ramp, show the list, and create only the vendors the user confirms in Ramp.

**Step 1: Read Business Central vendors**

Call `business-central-get-vendor` (Business Central server) with `blocked` empty or false, `name.contains` set to `{vendor-name}` when given, and `max-records` 50. Keep `vendor-number`, `name`, `email`, `country-code`, `state`.

**Step 2: Check Ramp**

For each vendor call `ramp-get-vendor` (Ramp server) with `name.contains` set to the vendor's name. Treat a vendor as existing if a Ramp vendor has the same normalised name (lower case, suffixes such as Inc, LLC, Ltd and punctuation removed). Possible matches that are not exact go on a separate list and are never created.

**Step 3: Present and confirm**

Show a table of missing vendors with `vendor-number`, `name`, `email`, `country-code`. List separately vendors that cannot be created because `email` or `country-code` is empty (Ramp requires both). Ask the user which vendors to create and wait for an explicit answer. Create nothing before that answer.

**Step 4: Create**

For each confirmed vendor call `ramp-vendor-add` (Ramp server) with `name`, `country` set to the Business Central `country-code`, `business_vendor_contacts_email` set to `email`, `state` when present, and `external_vendor_id` set to the Business Central `vendor-number`. Call one vendor at a time. After each, report the result; if one fails, say why and continue with the rest only if the user has said to.

**Step 5: Verify**

Call `ramp-get-vendor` again for each created vendor and report its new `id`.

**Rules & Guidelines:**

* `business-central-get-vendor` is on the Business Central server. `ramp-get-vendor` and `ramp-vendor-add` are on the Ramp server.
* The only write allowed is `ramp-vendor-add`, only after confirmation. Do not call `ramp-vendor-update`, `ramp-vendor-delete`, `business-central-create-vendor` or `business-central-update-vendor`.

**Validation:**

* If Business Central returns no vendors, say so and stop.
* If the user does not confirm, make no changes and say so.
* Never invent an email or country for a vendor that lacks one.