feat(k3s): add node taints configuration and update documentation

ansible/inventory/hosts.yml

@@ -22,16 +22,22 @@ all:
           cluster_init: true
           node_region: cn-sh
           use_mirror: true
+          node_taints:
+            - "node-role.kubernetes.io/control-plane:NoSchedule"
         tcb:
           ansible_host: tcb.node.dev.cm
           node_hostname: tcb
           node_region: cn-sh
           use_mirror: true
+          node_taints:
+            - "node-role.kubernetes.io/control-plane:NoSchedule"
         tcc:
           ansible_host: tcc.node.dev.cm
           node_hostname: tcc
           node_region: cn-sh
           use_mirror: true
+          node_taints:
+            - "node-role.kubernetes.io/control-plane:NoSchedule"
 
     # Agent 节点 (Worker)
     agents: