Remove compiled binary from version control and add to gitignore

The stacktodate-cli binary should not be committed to git as it:
- Creates unnecessary repository bloat (12MB+)
- Is platform-specific and won't work across different OS/architectures
- Should be built from source instead
- Makes it harder to track meaningful code changes

Users should build the binary from source using: go build -o stacktodate-cli

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Haiku 4.5 <[email protected]>

Author: ceritium

.gitignore

@@ -32,6 +32,7 @@ build/
 
 # Application binary
 stacktodate
+stacktodate-cli
 
 # Claude Code
 .claude/