Rename feed directory to feeds

Update output directory path in main.go and .gitignore to use
feeds/ instead of feed/.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -1,2 +1,4 @@
 1440.news
 go.*
+*.gz
+feeds/

main.go

@@ -200,7 +200,7 @@ func (c *Crawler) openTLDFile(tld string) error {
 	
 	// Open new file
 	if tld != "" {
-		filename := "feed/" + tld + ".feed"
+		filename := "feeds/" + tld + ".feed"
 		file, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
 		if err != nil {
 			return fmt.Errorf("failed to open TLD file %s: %v", filename, err)
@@ -217,7 +217,7 @@ func (c *Crawler) sortAndDeduplicateTLDFile() {
 		return
 	}
 
-	filename := "feed/" + c.currentTLD + ".feed"
+	filename := "feeds/" + c.currentTLD + ".feed"
 	
 	// Read all lines from the file
 	file, err := os.Open(filename)