Restrict closure expression to be something like {|| ...} (#8290)

# Description

As title, closes: #7921 closes: #8273

# User-Facing Changes

when define a closure without pipe, nushell will raise error for now:
```
❯ let x = {ss ss}
Error: nu::parser::closure_missing_pipe

  × Missing || inside closure
   ╭─[entry #2:1:1]
 1 │ let x = {ss ss}
   ·         ───┬───
   ·            ╰── Parsing as a closure, but || is missing
   ╰────
  help: Try add || to the beginning of closure
```

`any`, `each`, `all`, `where` command accepts closure, it forces user
input closure like `{||`, or parse error will returned.
```
❯ {major:2, minor:1, patch:4} | values | each { into string }
Error: nu::parser::closure_missing_pipe

  × Missing || inside closure
   ╭─[entry #4:1:1]
 1 │ {major:2, minor:1, patch:4} | values | each { into string }
   ·                                             ───────┬───────
   ·                                                    ╰── Parsing as a closure, but || is missing
   ╰────
  help: Try add || to the beginning of closure
```

`with-env`, `do`, `def`, `try` are special, they still remain the same,
although it says that it accepts a closure, but they don't need to be
written like `{||`, it's more likely a block but can capture variable
outside of scope:
```
❯ def test [input] { echo [0 1 2] | do { do { echo $input } } }; test aaa
aaa
```

Just realize that It's a big breaking change, we need to update config
and scripts...

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-cmd-lang/src/core_commands/do_.rs

@@ -22,7 +22,11 @@ impl Command for Do {
 
     fn signature(&self) -> Signature {
         Signature::build("do")
-            .required("closure", SyntaxShape::Any, "the closure to run")
+            .required(
+                "closure",
+                SyntaxShape::OneOf(vec![SyntaxShape::Closure(None), SyntaxShape::Any]),
+                "the closure to run",
+            )
             .input_output_types(vec![(Type::Any, Type::Any)])
             .switch(
                 "ignore-errors",

crates/nu-cmd-lang/src/core_commands/try_.rs

@@ -26,7 +26,10 @@ impl Command for Try {
                 "catch_block",
                 SyntaxShape::Keyword(
                     b"catch".to_vec(),
-                    Box::new(SyntaxShape::Closure(Some(vec![SyntaxShape::Any]))),
+                    Box::new(SyntaxShape::OneOf(vec![
+                        SyntaxShape::Closure(None),
+                        SyntaxShape::Closure(Some(vec![SyntaxShape::Any])),
+                    ])),
                 ),
                 "block to run if try block fails",
             )