[Brownie support] Compilation errors

[kanej]

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This is feedback: https://github.com/nomiclabs/hardhat-vscode-feedback/issues/5

Currently, we only show compilation errors for Hardhat projects. Different tools can compile the same codebase differently, leading to different compilation errors. For example, they may choose to use a different version of solc for a certain source file.

We need to detect when a project is using Brownie and get the compilation errors based on its compilation pipeline, ideally without reimplementing its logic.