New plugin pair LocalSink and LocalInput to pipe streams internally

sdrbase/resources/webapi/doc/swagger/include/LocalInput.yaml

@@ -0,0 +1,27 @@
+LocalInputSettings:
+  description: LocalInput
+  properties:
+    dcBlock:
+      type: integer
+    iqCorrection:
+      type: integer
+    fileRecordName:
+      type: string
+    useReverseAPI:
+      description: Synchronize with reverse API (1 for yes, 0 for no)
+      type: integer
+    reverseAPIAddress:
+      type: string
+    reverseAPIPort:
+      type: integer
+    reverseAPIDeviceIndex:
+      type: integer
+
+LocalInputReport:
+  description: LocalInput
+  properties:
+    centerFrequency:
+      type: integer
+      format: uint64
+    sampleRate:
+      type: integer

sdrbase/resources/webapi/doc/swagger/include/LocalSink.yaml

@@ -0,0 +1,25 @@
+LocalSinkSettings:
+  description: "Local channel sink settings"
+  properties:
+    localDeviceIndex:
+      description: "Receiving local device index"
+      type: integer
+    rgbColor:
+      type: integer
+    title:
+      type: string
+    log2Decim:
+      type: integer
+    filterChainHash:
+      type: integer
+    useReverseAPI:
+      description: Synchronize with reverse API (1 for yes, 0 for no)
+      type: integer
+    reverseAPIAddress:
+      type: string
+    reverseAPIPort:
+      type: integer
+    reverseAPIDeviceIndex:
+      type: integer
+    reverseAPIChannelIndex:
+      type: integer