Feature: Make #[trace] proc-macro-attribute IDE friendly

[taqtiqa-mark]

This feature is implemented in PR #127.should not be attempted until the new pipeline refactoring lands, and related bugs are squashed:

• implemented in PR Proc-macro pipeline (issue #113) #127

At that point we should try to make the proc-macro parsing errors more recoverable. From the user perspective it should mean they get prompted about relevant functions. In our case a prompt to use record(..) on the variable name passed in via the recorder=spanr attribute option.

An illustration of what this looks like is here (Tokio specific).

Relevant resources:

• IDEs and proc-macros: "fix" the proc-macro ecosystem
• Prior art implementation: Tokio PR Make tokio-macros attributes more IDE friendly tokio-rs/tokio#4162
  • Particularly darksonn's implementation suggestion
• Rust Analyzer discussion IDEs and proc-macros rust-lang/rust-analyzer#11014

[taqtiqa-mark]

Voided by PR #127 rejection.