fix(#44): output directory

[maxonfjvipon]

Ref: #44

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PR-Codex overview

Focus of this PR:

This PR focuses on optimizing the code by introducing a new output directory and rewriting XMIR files to the output directory when there is a fuse optimization.

Detailed summary:

• Introduces a new output directory for fused-xmir files
• Rewrites XMIR files to the output directory when there is a fuse optimization
• Logs information about written files and fuse optimizations

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[maxonfjvipon]

@rultor merge

[rultor]

@rultor merge

@maxonfjvipon OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@maxonfjvipon Done! FYI, the full log is here (took me 2min)