Added string pooling feature (#344) #370

Job	Run time
linux-cuda	0s
linux-vulkan	0s
linux-openvino	0s
macos-coreml	0s
windows-cuda	0s
windows-openvino	0s
windows-vulkan	0s
android / native-build	1m 46s
linux / native-build	2m 16s
linux-no-avx / native-build	1m 19s
macos / arm-native-build	2m 32s
macos / intel-native-build	1m 1s
wasm / native-build	1m 11s
windows / arm-native-build	2m 26s
windows / intel-native-build	2m 30s
windows-no-avx / native-build	2m 36s
dotnet-build / dotnet-macos	2m 58s
dotnet-build / dotnet-linux	1m 17s
dotnet-maui-build-and-test / dotnet-maui-build	6m 28s
dotnet-build / dotnet-windows	2m 53s
dotnet-maui-build-and-test / dotnet-maui-test-ios	4m 30s
dotnet-maui-build-and-test / dotnet-maui-test-android	4m 24s
	40m 7s

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