Complete statement command for Rust Analyzer

IntelliJ Rust has a very useful command called "complete statement". How it works:

• If current line is a well-formed statement, e.g let a = 2 then move cursor to the end of line and add a semicolon.
• If the line is in the middle of a function name, e.g fn func_name then transform it to

fn func_name(){

}

and move cursor to inside function body. Same for struct, enum, trait

• If we are in the middle of a well formed if clause, i.e: if x > 2, then transform it to:

if x > 2 {

}

and move cursor inside the curly brackets. Same for while, for, match, loop (this one is not in IntelliJ Rust but in Typescript and Kotlin on IntelliJ platform.)

• Any other cases, move cursor to the end of line. (or add more smarter behaviors, basically we try to complete the statement if it make senses)

It would be nice if Rust Analyzer can also have that. I normally bind this command to Shift + Enter key. That way I can end statements with one key combination. It's really convenient.

No files, tests, or entry points are named in the issue. Start by locating the existing editor-command handling for Rust Analyzer, then compare the requested function, struct, enum, trait, conditional, loop, and statement cases with the current behavior; done means the command handles the listed transformations and cursor placement.