Add container-level #[sqlx(try_from = T)]

[dprkh]

Does your PR solve an issue?

#2833

Is this a breaking change?

This is a new feature without breaking changes.

---

This PR adds ability to experience the pleasure of writing code like as follows.

use anyhow::*;

use derive_more::Display;

use serde::{Deserialize, Serialize};

use sqlx::Type;

#[derive(Clone, PartialEq, Display, Deserialize, Serialize, Type)]
#[serde(try_from = "String")]
#[sqlx(try_from = "String")]
pub struct Id(String);

impl TryFrom<String> for Id {
    type Error = Error;

    fn try_from(value: String) -> Result<Self> {
        if value.len() != 36 {
            bail!("user id length must be 36");
        }

        let id = Self(value);

        Ok(id)
    }
}

#[get("/api/users", database: Extension<Database>)]
async fn get_users() -> Result<Vec<(user::Id, user::Name)>, anyhow::Error> {
    sqlx::query(include_str!("./queries/get_users.sql"))
        .fetch_all(database.pool())
        .await
        .context("failed to execute query `get_users`")?
        .into_iter()
        .map(|row| {
            Ok::<_, anyhow::Error>((
                row.try_get::<user::Id, _>(0)
                    .context("failed to decode user id")?,
                row.try_get::<user::Name, _>(1)
                    .context("failed to decode user name")?,
            ))
        })
        .try_collect()
}