Add JSON streaming parser and configuration database libraries (#…

…2892)

This PR adds an initial release of the `ConfigDB` library which arose from discussion #2871. The library does not use `ArduinoJson` but instead a streaming parser which is a useful addition and well suited to parsing and filtering large data sets.

.gitmodules

@@ -213,6 +213,10 @@
 	path = Sming/Libraries/Arduino_TensorFlowLite
 	url = https://github.com/slaff/Arduino_TensorFlowLite.git
     ignore = dirty
+[submodule "Libraries.ConfigDB"]
+	path = Sming/Libraries/ConfigDB
+	url = https://github.com/mikee47/ConfigDB
+    ignore = dirty
 [submodule "Libraries.CS5460"]
 	path = Sming/Libraries/CS5460/CS5460
 	url = https://github.com/xxzl0130/CS5460.git
@@ -281,6 +285,10 @@
 	path = Sming/Libraries/ITEADLIB_Arduino_Nextion
 	url = https://github.com/itead/ITEADLIB_Arduino_Nextion.git
 	ignore = dirty
+[submodule "Libraries.JsonStreamingParser"]
+	path = Sming/Libraries/JsonStreamingParser
+	url = https://github.com/mikee47/JsonStreamingParser
+	ignore = dirty
 [submodule "Libraries.libsodium"]
 	path = Sming/Libraries/libsodium/libsodium
 	url = https://github.com/jedisct1/libsodium.git