[WIP] feat: implement schema inheritance and composition with schemars integration

[Artifizer]

- Add schematools and schemars dependencies for schema generation
- Refactor gts_schema_for! macro to use schemars for property extraction
- Implement proper allOf inheritance with $ref to direct parent types
- Add generic field type safety with additionalProperties: false
- Add GtsSchema trait methods for nesting path collection and schema wrapping
- Update tests to work with new schemars-based implementation
- Add comprehensive inheritance tests and examples
- Update README documentation for schema composition features
- Add gts-macros-cli tool for testing schema generation
- Fix schema resolution and inlining in GtsStore
- Add support for nested generic type composition (BaseEventV1<AuditPayloadV1<PlaceOrderDataV1>>)

[Bechma]

For me looks better to include the schema as Rust struct, and specify a gts apart.
So the final gts is composable.

[Bechma]

Idea:

#[struct_to_gts_schema(
    dir_path = "schemas",
    base = true,
    gts_id = "gts.x.core.events.type.v1~",
    description = "Base event type definition",
    properties = "event_type,id,tenant_id,sequence_id,payload"
)]
#[derive(Debug, Serialize, Deserialize, JsonSchema)]
pub struct BaseEventV1<P> {
    #[serde(rename = "type")]
    pub event_type: String,
    pub id: uuid::Uuid,
    pub tenant_id: uuid::Uuid,
    pub sequence_id: u64,
    pub payload: P,
}

#[struct_to_gts_schema(
    dir_path = "schemas",
    base = BaseEventV1,
    gts_id = "x.core.audit.event.v1~",
    description = "Audit event with user context",
    properties = "user_agent,user_id,ip_address,data"
)]
#[derive(Debug, Serialize, Deserialize, JsonSchema)]
pub struct AuditPayloadV1<D> {
    pub user_agent: String,
    pub user_id: uuid::Uuid,
    pub ip_address: String,
    pub data: D,
}

#[struct_to_gts_schema(
    dir_path = "schemas",
    base = AuditPayloadV1,
    gts = "x.marketplace.orders.purchase.v1~",
    description = "Order placement audit event",
    properties = "order_id,product_id"
)]
#[derive(Debug, Serialize, Deserialize, JsonSchema)]
pub struct PlaceOrderDataV1<E> {
    pub order_id: uuid::Uuid,
    pub product_id: uuid::Uuid,
    pub last: E,
}

Note the change in the macro

[Artifizer]

I was thinking about the same at some moment, actually
Let me try to implement it

[MikeFalcon77]

It's not used anywhere. Also it's doing allOf merge wrong. Let's remove it.

[MikeFalcon77]

As I remember only schemars = "1.1" supports json schema Draft 2020-12