Add pagination to task index page

[yammmt]

It would be helpful if I have lots of tasks.

[yammmt]

For DB side, limit and offset method provided by QueryDsl works fine. For example:

const TASK_PAGE_SIDZE: i64 = 5;

impl<'a, 'b> IndexContext<'a, 'b> {
    pub fn err(conn: &DbConn, msg: &'a str) -> IndexContext<'static, 'a> {
        IndexContext{ msg: Some(("warning", msg)), tasks: Task::all(conn), labels: Label::all(conn) }
    }

    pub fn raw(conn: &DbConn, msg: Option<(&'a str, &'b str)>, offset: i64) -> IndexContext<'a, 'b> {
        IndexContext{
            msg,
            tasks: Task::with_offset_and_limit(conn, offset, TASK_PAGE_SIZE),
            labels: Label::all(conn)
        }
    }
}

And Bulma provides pagination style too (document). I could implement pagination with them.

---

However, I have to think of current routes:

last-date/src/routes/task.rs

Lines 55 to 56 in 18544ef

	#[get("/")]
	pub fn index(msg: Option<FlashMessage>, conn: DbConn) -> Template {

last-date/src/routes/task.rs

Lines 77 to 78 in 18544ef

	#[get("/<id>")]
	pub fn edit(id: i32, msg: Option<FlashMessage>, conn: DbConn) -> Template {

If I want to keep the current URL, the pagination URL seems to be /page/1 or so. But this seems a little crazy for me. For me, /<number> should be the page number of the pagination, and instead /task/<number> should be the individual task page. How about the other sites on Internet? 🤔

Note that there are multiple HTTP methods for the /<number> route. Don't forget to see the src/routes/task.rs file.