Start defining the default for a Linear NN

linear1.rs

pub struct LinearConfig {
    pub ws_init: super::Init,
    pub bs_init: Option<super::Init>,
    pub bias: bool,
}

impl Default for LinearConfig {
    fn default() -> Self {
        LinearConfig { ws_init: super::Init::KaimingUniform, bs_init: None, bias: true }
    }
}