feat(law): implement the program query

contracts/cw-law-stone/src/contract.rs

@@ -58,8 +58,22 @@ pub fn execute(
 }
 
 #[cfg_attr(not(feature = "library"), entry_point)]
-pub fn query(_deps: Deps<'_>, _env: Env, _msg: QueryMsg) -> StdResult<Binary> {
-    Err(StdError::generic_err("Not implemented"))
+pub fn query(deps: Deps<'_, LogicCustomQuery>, _env: Env, msg: QueryMsg) -> StdResult<Binary> {
+    match msg {
+        QueryMsg::Ask { .. } => Err(StdError::generic_err("not implemented")),
+        QueryMsg::Program => to_binary(&query::program(deps)?),
+    }
+}
+
+pub mod query {
+    use super::*;
+    use crate::msg::ProgramResponse;
+    use crate::state::PROGRAM;
+
+    pub fn program(deps: Deps<'_, LogicCustomQuery>) -> StdResult<ProgramResponse> {
+        let program = PROGRAM.load(deps.storage)?;
+        Ok(ProgramResponse::from(program))
+    }
 }
 
 #[cfg_attr(not(feature = "library"), entry_point)]