feat: add multiple getters mode in generate_getter

This commit adds two modes to generate_getter action.
First, the plain old working on single fields.
Second, working on a selected range of fields.

Author: feniljain

crates/ide-assists/src/handlers/generate_getter.rs

@@ -216,9 +216,9 @@ pub(crate) fn generate_getter_impl(
 
                 // We don't insert a new line at the end of
                 // last getter as it will end up in the end
-                // of an impl where we would like to keep getter
-                // and end of impl ( i.e. `}` ) with a extra line
-                // for no reason
+                // of an impl where we would not like to keep
+                // getter and end of impl ( i.e. `}` ) with an
+                // extra line for no reason
                 if i < record_fields_count - 1 {
                     buf = buf + "\n";
                 }