Automatically add `target/` to `.sindriignore`

[katiemckeon]

🌟 Feature Request

📝 Description

Since the .sindriignore convention is not widely advertised and certain IDE's automatically compile rust in target/, we often see slow project deployments due to irrelevant build files. This feature would automatically ignore files in target/ for any path submitted to the circuit_create method unless otherwise specified.

🤔 Rationale

Any users with a larger codebase or those who frequently recompile their projects would notice a speedup.

📋 Additional Context

Add any other context or information about the feature request here.