[Enhancement] Enhancement the schema attribute completing in composite schema, list, dict and union types.

[Peefy]

Due to the advanced resolver and schema config scope owner https://github.com/kcl-lang/kcl/blob/main/kclvm/sema/src/advanced_resolver/node.rs#L1132. It does not cover all situations. For example

schema Name:
    n: str

schema Config:
    names: [Name]

Config{
    names: [{<cursor>}]
} 

The completion item of <cursor> is n instead of names.

More background and examples can be seen in this PR #1096

[He1pa]

2

[He1pa]

3 #1343