update readme on how to build jet

[metaclips]

Minor update to readme on how to build Jet

[Copilot]

Pull request overview

Updates the root README build instructions for Yellowstone Jet so users can build the intended binary rather than building the whole workspace by default.

Changes:

• Switch README build command to target the jet binary explicitly (cargo build --bin jet --release).
• Add a note about the expected output path for the built binary.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

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[leafaar]

Thanks for the contribution, could you apply/verify the suggestions I made?

[metaclips]

Thanks for the contribution, could you apply/verify the suggestions I made?

Thanks @leafaar I implemented your suggestions.

While reviewing the systemd configuration, I noticed that it still references the yellowstone-jet binary instead of jet. This could cause issues for first-time users.

Should we rename ./apps/jet/src/bin/jet.rs to yellowstone-jet.rs so the built binary matches the configuration, or should we standardize on the jet binary name across the project?

[leafaar]

need to tag @ananthb here for this