feat: refactor to proper Go structure and add folder/recursive support

- Refactor to cmd/internal structure following Go best practices
- Add support for processing directories (files in folder)
- Add -r/--recursive flag for recursive directory traversal
- Split code into logical packages: types, processor, languages
- Fix --version flag to work properly with kong
- Update build path in GitHub Actions workflow
- Version bump to 0.1.0 for new major features

internal/types/types.go

@@ -0,0 +1,24 @@
+package types
+
+import "github.com/alecthomas/kong"
+
+type CLI struct {
+	Path      string `arg:"" name:"path" help:"Source code file or directory to process" optional:""`
+	Inline    bool   `help:"Remove only line comments"`
+	Block     bool   `help:"Remove only block comments"`
+	Recursive bool   `short:"r" help:"Process directories recursively"`
+	DryRun    bool   `help:"Show what would be removed without making changes"`
+	Backup    bool   `help:"Create backup files before modification"`
+	Verbose   bool   `help:"Show detailed output"`
+	Version   kong.VersionFlag `help:"Show version information"`
+}
+
+type Language struct {
+	LineComment  string
+	BlockComment *BlockComment
+}
+
+type BlockComment struct {
+	Start string
+	End   string
+}