fix: Remove deprecated folder and logs

Author: yufeiminds

MoonBit.gitignore

@@ -1,13 +1,11 @@
 # Build System Artifacts
 _build/            # MoonBit default build output directory.
-.moon/             # MoonBit internal cache and metadata directory.
 .mooncakes/        # Local MoonBit package cache directory.
 
 # Coverage and Test Artifacts
 moonbit-coverage-*.txt # Coverage reports generated by MoonBit tooling.
 _coverage          # Coverage output directory used by coverage commands.
 bisect.coverage    # Bisect runtime coverage data file.
-*.log              # Log files generated during test/build runs.
 
 # JavaScript Target Artifacts
 # *.js             # Uncomment if generated JavaScript should be ignored.
@@ -20,7 +18,6 @@ node_modules/      # Node.js dependencies used in JS target workflows.
 
 # MoonBit Pilot / Agent Artifacts
 .moonagent/        # MoonBit agent runtime state and temporary files.
-moonagent.log      # MoonBit agent log output.
 
 # LLVM Backend Artifacts
 *.ll               # LLVM textual intermediate representation (IR) files.