ADDS: adding supported nbis page

doc/supported_nbis.md

 This section summarizes the NBI connectors supported by the TeraFlowSDN controller to interoperate with OSS/BSS/NFVO on top of it.
 
-    - [6.1. TFS API](#61-tfs-apie)
-    - [6.2. ETSI Bandwidth Management (BWM)](#62-etsi-bandwidth-management-bwm)
-    - [6.3. IETF L2VPN Service Delivery (L2SM) [RFC8466]](#63-ietf-l2vpn-service-delivery-l2sm-rfc8466)
-    - [6.4. IETF L3VPN Service Delivery (L3SM) [RFC8299]](#64-ietf-l3vpn-service-delivery-l3sm-rfc8299)
-    - [6.5. IETF Network Topology [RFC8345]](#65-ietf-network-topology-rfc8345)
-    - [6.6. IETF Network Slice Service [draft-ietf-teas-ietf-network-slice-nbi-yang]](#66-ietf-network-slice-service-draft-ietf-teas-ietf-network-slice-nbi-yang)
+- [6.1. TFS API](#61-tfs-apie)
+- [6.2. ETSI Bandwidth Management (BWM)](#62-etsi-bandwidth-management-bwm)
+- [6.3. IETF L2VPN Service Delivery (L2SM) [RFC8466]](#63-ietf-l2vpn-service-delivery-l2sm-rfc8466)
+- [6.4. IETF L3VPN Service Delivery (L3SM) [RFC8299]](#64-ietf-l3vpn-service-delivery-l3sm-rfc8299)
+- [6.5. IETF Network Topology [RFC8345]](#65-ietf-network-topology-rfc8345)
+- [6.6. IETF Network Slice Service [draft-ietf-teas-ietf-network-slice-nbi-yang]](#66-ietf-network-slice-service-draft-ietf-teas-ietf-network-slice-nbi-yang)
 
 ## **6.1. TFS APIe**
 
@@ -14,39 +14,48 @@ This NBI connector exposes the basic gRPC methods of TeraFlowSDN that enable to
 <h3><u>Exposed endpoints:</h3></u>
 
 **Endpoint `/tfs-api/context_ids`**
+
 - Method: `GET`
   - Used to list the context identifiers
 
 **Endpoint `/tfs-api/contexts`**
+
 - Method: `GET`
   - Used to list the details of all contexts
 
 **Endpoint `/tfs-api/dummy_contexts`**
+
 - Method: `GET`
   - Used to dump contexts (including related topologies, devices, links, services, slices, and connections) in a snapshot format that can be imported directly in TeraFlowSDN WebUI.
   - IMPORTANT: the resulting document is processed by WebUI in dummy mode, i.e., just to populate Context database, but not interacting with Device, Service, and Slice components.
 
 **Endpoint `/tfs-api/context/<path:context_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/topology_ids`**
+
 - Method: `GET`
   - Used to list the topology identifiers in a context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/topologies`**
+
 - Method: `GET`
   - Used to list all the topology details in a context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/topology/<path:topology_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific topology in a context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/service_ids`**
+
 - Method: `GET`
   - Used to list the service identifiers in a context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/services`**
+
 - Method: `GET`
   - Used to list all the service details in a context
 
@@ -60,66 +69,82 @@ This NBI connector exposes the basic gRPC methods of TeraFlowSDN that enable to
   - Used to delete a service
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/service/<path:service_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific service in a context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/slice_ids`**
+
 - Method: `GET`
   - Used to list the slice identifiers in a context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/slices`**
+
 - Method: `GET`
   - Used to list all the slice details in a context
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/slice/<path:slice_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific slice in a context
 
 **Endpoint `/tfs-api/device_ids`**
+
 - Method: `GET`
   - Used to list the device identifiers
 
 **Endpoint `/tfs-api/devices`**
+
 - Method: `GET`
   - Used to list the device details
 
 **Endpoint `/tfs-api/device/<path:device_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific device
 
 **Endpoint `/tfs-api/link_ids`**
+
 - Method: `GET`
   - Used to list the link identifiers
 
 **Endpoint `/tfs-api/links`**
+
 - Method: `GET`
   - Used to list the link details
 
 **Endpoint `/tfs-api/link/<path:link_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific link
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/service/<path:service_uuid>/connection_ids`**
+
 - Method: `GET`
   - Used to list the connection identifiers related to a service
 
 **Endpoint `/tfs-api/context/<path:context_uuid>/service/<path:service_uuid>/connections`**
+
 - Method: `GET`
   - Used to list all the connection details related to a service
 
 **Endpoint `/tfs-api/connection/<path:connection_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific connection
 
 **Endpoint `/tfs-api/policyrule_ids`**
+
 - Method: `GET`
   - Used to list all the policy rule identifiers
 
 **Endpoint `/tfs-api/policyrules`**
+
 - Method: `GET`
   - Used to list all the policy rule details
 
 **Endpoint `/tfs-api/policyrule/<path:policyrule_uuid>`**
+
 - Method: `GET`
   - Used to retrieve a specific policy rule