[Enhancement] New NN Features and Network Configurations and Optimizations

[hikettei]

im so sleepy that i could fall over and i dont feel like writing description see the docs

• [Add] node->lambda node->defun
• [Opt] Softmax-Cross-Entropy-Loss
• [Add] !elu !gelu !leakey-relu LayerNorm
• [Add] ftype decls to standard apis