Make changes required for Go translation to support generics

[AndyTitu]

📰 Overview

The current TypeShare implementation we're using doesn't support Struct Generics in Go.

🚀 Acceptance Criteria

• The following rust snippet should translate to the following Go snippet:

#[typeshare]
#[derive(Debug, Deserialize, Serialize, PartialEq, Clone)]
#[serde(rename_all = "camelCase")]
pub(crate) struct ItemsGetAllResponse {
    pub(crate) individual_responses: Vec<IndividualResponse<Item, ItemsGetAllError>>,
}

#[typeshare]
#[derive(Debug, Deserialize, Serialize, PartialEq, Clone)]
#[serde(rename_all = "camelCase")]
pub(crate) struct IndividualResponse<T, E> {
    pub(crate) content: Option<T>,
    pub(crate) error: Option<E>,
}

type IndividualResponse[T any, E any] struct {
	Content *T `json:"content,omitempty"`
	Error *E `json:"error,omitempty"`
}

type ItemsGetAllResponse struct {
	IndividualResponses []IndividualResponse[Item, ItemsGetAllError] `json:"individualResponses"`
}

while currently it translates to

type IndividualResponse struct {
	Content *T `json:"content,omitempty"`
	Error *E `json:"error,omitempty"`
}

type ItemsGetAllResponse struct {
	IndividualResponses []IndividualResponse<Item, ItemsGetAllError> `json:"individualResponses"`
}

[hculea]

Haven't functionally tested, but code looks good. Thanks for the callout on generic trait bounds.