Replace prazdnikisegodnyaru with celebratoday, small underhood fixes

- Replace prazdnikisegodnyaru with celebratoday as first is banned in Russia
- Update .golangci.yml rule set
- Megatons of fixes for linter
- Update README.md

internal/anekdotru/anekdotru.go

@@ -1,3 +1,4 @@
+// Package anekdotru implemets client for anekdot.ru service.
 package anekdotru
 
 import (
@@ -23,11 +24,7 @@ func APIClient(cfg *config.MyConfig) (string, error) {
 		url       = "https://www.anekdot.ru/rss/randomu.html"
 	)
 
-	err := requests.
-		URL(url).
-		UserAgent(userAgent).
-		ToBytesBuffer(&respBody).
-		Fetch(ctx)
+	err := requests.URL(url).UserAgent(userAgent).ToBytesBuffer(&respBody).Fetch(ctx)
 
 	if err != nil {
 		return "", fmt.Errorf("unable to GET %s: %w", url, err)
@@ -42,6 +39,7 @@ func APIClient(cfg *config.MyConfig) (string, error) {
 
 	if (len(aneks) >= 2) && (aneks[1] != "") {
 		re = regexp.MustCompile(`'\);`)
+
 		a := re.Split(aneks[1], 2)
 
 		if (len(a) >= 2) && (a[0] != "") {
@@ -51,7 +49,9 @@ func APIClient(cfg *config.MyConfig) (string, error) {
 			anek = re.ReplaceAll(anek, []byte(`"`))
 
 			re = regexp.MustCompile(`\\"`)
+
 			anekJSON := re.ReplaceAll(anek, []byte(`"`))
+
 			anekJSON = bytes.ToValidUTF8(anekJSON, []byte{0xef, 0xbf, 0xbd})
 
 			var anekMap []string
@@ -60,6 +60,7 @@ func APIClient(cfg *config.MyConfig) (string, error) {
 			}
 
 			re = regexp.MustCompile(`<br>`)
+
 			answer := re.ReplaceAll([]byte(anekMap[0]), []byte("\n"))
 
 			return string(answer), nil