refactor: better project structure (#35)

This project is starting to grow, and I've seen flaws in the initial
project structure design
I think I'll restructure the entire project directory for better
scalability and also cleaner

root/suggestions_test.go

@@ -0,0 +1,49 @@
+package root
+
+import (
+	"testing"
+
+	"github.com/versenilvis/iris/spec"
+)
+
+func TestMergeResults(t *testing.T) {
+
+	t.Run("Dedup exact match", func(t *testing.T) {
+		// Mock history items that might conflict with specs
+		res := MergeResults("git", "spec")
+		seen := make(map[string]bool)
+		for _, r := range res {
+			if seen[r.Cmd] {
+				t.Errorf("Duplicate suggestion found: %q", r.Cmd)
+			}
+			seen[r.Cmd] = true
+		}
+	})
+
+
+	t.Run("Limit 100", func(t *testing.T) {
+		res := MergeResults("a", "history")
+		if len(res) > 100 {
+			t.Errorf("Expected max 100 suggestions, got %d", len(res))
+		}
+	})
+
+	t.Run("AI Suggestion Promotion", func(t *testing.T) {
+		aiSugg := &spec.Suggestion{
+			Cmd:        "git commit -m \"fix(auth): login bug\"",
+			Desc:       "AI suggestion",
+			Source:     "ai",
+			Confidence: 85,
+		}
+		SetCurrentAISuggestion(aiSugg)
+		defer SetCurrentAISuggestion(nil)
+
+		res := MergeResults("git c", "history")
+		if len(res) == 0 {
+			t.Fatalf("Expected suggestions, got 0")
+		}
+		if res[0].Cmd != aiSugg.Cmd {
+			t.Errorf("Expected AI suggestion at index 0, got %q (confidence %d)", res[0].Cmd, res[0].Confidence)
+		}
+	})
+}