doc(instance): add scaleway_instance_servers datasource doc

Author: Codelax

docs/data-sources/instance_servers.md

@@ -0,0 +1,58 @@
+---
+page_title: "Scaleway: scaleway_instance_servers"
+description: |-
+Gets information about multiple Instance Servers.
+---
+
+# scaleway_instance_servers
+
+Gets information about multiple instance servers.
+
+## Examples
+
+### Basic
+
+```hcl
+# Find servers by tag
+data "scaleway_instance_servers" "my_key" {
+  tags  = ["tag"]
+}
+
+# Find servers by name and zone
+data "scaleway_instance_servers" "my_key" {
+  name = "myserver"
+  zone = "fr-par-2"
+}
+```
+
+### With single datasource
+
+```hcl
+# Find servers by tag
+data "scaleway_instance_servers" "servers_by_tag" {
+  tags  = ["tag"]
+}
+
+data "scaleway_instance_servers" "map_of_servers" {
+  for_each = {for server in data.scaleway_instance_servers.servers_by_tag.servers: server.id => server}
+  server_id = each.value.id
+}
+```
+
+## Argument Reference
+
+- `name` - (Optional) The server name used as filter.
+
+- `tags` - (Optional) List of tags used as filter.
+
+- `zone` - (Defaults to [provider](../index.md#zone) `zone`) The [zone](../guides/regions_and_zones.md#zones) in which servers exist.
+
+## Attributes Reference
+
+In addition to all above arguments, the following attributes are exported:
+
+- `id` - The zone of the servers
+
+- `servers` - List of found servers
+  - `id` - The ID of the server.
+  - `public_ip` - The public IPv4 address of the server.