Upgrade Sonyflake to v2 (#66)

* Add v2

* Introduce staticcheck

* Introduce golangci-lint

* Add error checks

* Add error checks

* Lint v2 code

* Improve CI trigger

* Use io.ReadAll

* Use int64

* Remove NewSonyflake

* Fix errors

* v2: Change MachineID, sequence, and AmazonEC2MachineID to int; update all usage and tests for type consistency

* docs: update Settings struct in README to use int for MachineID and CheckMachineID (v2)

* docs(v2): clarify Settings, StartTime, MachineID, and CheckMachineID comments and update README links and explanations

* docs(v2/mock): improve comments and docstrings for mock implementations

* docs(types): unify and clarify package and type docstrings for types.go in v1 and v2

* test(v2): refactor and modernize tests, improve error assertions, and update mocks for v2

* test(v2): normalize whitespace in pseudoSleep calls for consistency

* feat(v2): add configurable TimeUnit and refactor time handling for So… (#67)

* feat(v2): add configurable TimeUnit and refactor time handling for Sonyflake v2

* test(v2): add ToTime tests, clarify TimeUnit behavior, and update docs for v2

* gofmt

example/sonyflake_server.go

@@ -33,10 +33,17 @@ func handler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	w.Header()["Content-Type"] = []string{"application/json; charset=utf-8"}
-	w.Write(body)
+	_, err = w.Write(body)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
 }
 
 func main() {
 	http.HandleFunc("/", handler)
-	http.ListenAndServe(":8080", nil)
+	err := http.ListenAndServe(":8080", nil)
+	if err != nil {
+		panic(err)
+	}
 }