Add quick reply, skill definition, and tag seeds for multilingual support

- Implemented QuickReplySeed structure and seeds for both English and Chinese languages.
- Created SkillDefinitionSeed structure with detailed instructions and examples for the "After-sales Escalation" skill in both languages.
- Added TagSeed structure and corresponding seeds for categorizing inquiries in English and Chinese.
- Refactored skill and tag initialization to utilize the new seed structures, ensuring proper data handling and multilingual support.
- Updated tests to verify that English seeds do not contain Chinese text, ensuring data integrity.

cmd/testdata/seeds/agentteam.go

@@ -0,0 +1,55 @@
+package seeds
+
+import "agent-desk/cmd/testdata/seedlang"
+
+type AgentUserSeed struct {
+	Username string
+	Nickname string
+	Code     string
+}
+
+func AgentTeamName(lang seedlang.Language) string {
+	if lang == seedlang.English {
+		return "Default Support Team"
+	}
+	return "默认客服组"
+}
+
+func AgentUsers(lang seedlang.Language, leaderUsername string) []AgentUserSeed {
+	if lang == seedlang.English {
+		return []AgentUserSeed{
+			{
+				Username: leaderUsername,
+				Nickname: "Support Lead",
+				Code:     "AGENT_LEADER_A",
+			},
+			{
+				Username: "agent_a",
+				Nickname: "Agent A",
+				Code:     "AGENT_A",
+			},
+			{
+				Username: "agent_b",
+				Nickname: "Agent B",
+				Code:     "AGENT_B",
+			},
+		}
+	}
+	return []AgentUserSeed{
+		{
+			Username: leaderUsername,
+			Nickname: "客服组长",
+			Code:     "AGENT_LEADER_A",
+		},
+		{
+			Username: "agent_a",
+			Nickname: "客服A",
+			Code:     "AGENT_A",
+		},
+		{
+			Username: "agent_b",
+			Nickname: "客服B",
+			Code:     "AGENT_B",
+		},
+	}
+}