Vue end-to-end prototype

[rimutaka]

Build a simple end-to-end prototype using Vue with the following functionality:

• employer login via LinkedIn

• parsing of JWT token by Lambda

• returning a GraphQL response with homepage data

• move custom styles from App.vue to a shared space to match HTML UI styles

[rimutaka]

• validate JWT contents in Vue to give an informative error about name / email completeness
• use a custom Validation config object for time leeway

[rimutaka]

• reuse GQL schema between calls (RootNode::new_with_scalar_value)
• understand why we need this in fn deserialize:

            fn visit_u64<E: de::Error>(self, b: u64) -> Result<Self::Value, E> {
                // I do not understand why this IF is needed
                if b <= u64::from(u32::MAX) {
                    self.visit_i32(b.try_into().unwrap())
                } else {
                    Ok(RustScalarValue::U64(b))
                }
            }