rename selected identifier
Usage:
gopls [flags] rename [rename-flags] <position> <name>
Example:
$ # 1-based location (:line:column or :#position) of the thing to change
$ gopls rename helper/helper.go:8:6 Foo
$ gopls rename helper/helper.go:#53 Foo
rename-flags:
-d,-diff
display diffs instead of edited file content
-l,-list
display names of edited files
-preserve
with -write, make copies of original files
-w,-write
write edited content to source files