Let service definitions return code ranges scoped to name

[riseshia]

Summary

service#definitions with method call returns full code range of def node now, which results to point def keyword.
IMO, which is not expected behavior, and it supposed to move cursor to the start of the method name. I confirmed rust analyzer, js lsp do the same thing, so proposed behavior is more friendly to end user.

Changes

DefNode's mid_code_range attr has name token loc, so just return it instead of which could be enough.
Ref:

typeprof/lib/typeprof/core/ast/method.rb

Line 117 in 1601d0c

mid_code_range = TypeProf::CodeRange.from_node(raw_node.name_loc)

or should we override code_range method of Node class? 🤔

[mame]

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