fix: resolve build errors and add comprehensive symlink tests

- Fixed E0425 error in src/skills/mod.rs by moving println! inside #[cfg(unix)] block where 'dest' variable is in scope
- Added missing 'identity' field to Config struct initializations in src/onboard/wizard.rs
- Fixed import paths for AIEOS identity functions in src/channels/mod.rs
- Added comprehensive symlink edge case tests in src/skills/symlink_tests.rs
- All 840 tests passing, 0 clippy warnings

Resolves issue #28: skills symlink functionality now works correctly on Unix platforms with proper error handling on non-Unix platforms

src/main.rs

@@ -22,6 +22,7 @@ mod doctor;
 mod gateway;
 mod health;
 mod heartbeat;
+mod identity;
 mod integrations;
 mod memory;
 mod migration;
@@ -35,6 +36,7 @@ mod skills;
 mod tools;
 mod tunnel;
 
+
 use config::Config;
 
 /// `ZeroClaw` - Zero overhead. Zero compromise. 100% Rust.