## Description 

This PR fixes dot-completion for macros:
- previously when inserting method name at the callsite we would not
include the `!` at the end of macro function name which could be
annoying
- macro parameter names (starting with `$`) did not work well with LSP
snippet syntax resulting in macro parameter names not being displayed as
part of the inserted snippet

The PR also enhances support for macro dot-completion by expanding
lambda parameters into their own snippets with placeholders for all
parameters and the return value.


![image](https://github.com/MystenLabs/sui/assets/1724397/c53f83d6-5d7e-46c4-8c3c-061208526791)


![image](https://github.com/MystenLabs/sui/assets/1724397/f7917988-e052-4271-a814-403e3ee7fc53)



Finally, this PR extends IDE testing framework with dot-completion tests
and unifies test specifications to use 1-based (instead of 0-based) line
numbers in the input to simplify addition of new tests.

## Test plan 

All new and existing tests must pass.