feat: update LNM centralnode

* Add conversion to Amps on PSC command
* Add access to number of BPM in the correction

recipes-app/fofb-opcua-server/files/lnm_central.xlmap

@@ -379,12 +379,19 @@
         <targetRegister>APP.corr_matrix_0.CONTROL_Y</targetRegister>
     </redirectedRegister>
 
+    <redirectedRegister name="corr_num_bpm">
+        <targetDevice>APPUIO</targetDevice>
+        <targetRegister>APP.corr_matrix_0.MM_ID_CNT</targetRegister>
+    </redirectedRegister>
 
     <redirectedRegister name="corr_command_x">
         <targetDevice>APPUIO</targetDevice>
         <targetRegister>APP.corr_matrix_0.CORRCMD</targetRegister>
         <targetStartIndex>1</targetStartIndex>
         <numberOfElements>50</numberOfElements>
+        <plugin name="multiply">
+          <parameter name="factor">0.00030517578125</parameter>
+        </plugin>
     </redirectedRegister>
 
     <redirectedRegister name="corr_command_y">
@@ -392,6 +399,9 @@
         <targetRegister>APP.corr_matrix_0.CORRCMD</targetRegister>
         <targetStartIndex>51</targetStartIndex>
         <numberOfElements>50</numberOfElements>
+        <plugin name="multiply">
+          <parameter name="factor">0.00030517578125</parameter>
+        </plugin>
     </redirectedRegister>
 
     <redirectedRegister name="orbit_error_x">