fix(ilanzou): parse vip size

[KirCute]

Description / 描述

蓝奏云优享版计算总容量增加vipSize

Motivation and Context / 背景

How Has This Been Tested? / 测试

Checklist / 检查清单

• I have read the CONTRIBUTING document.
  我已阅读 CONTRIBUTING 文档。
• I have formatted my code with go fmt or prettier.
  我已使用 go fmt 或 prettier 格式化提交的代码。
• I have added appropriate labels to this PR (or mentioned needed labels in the description if lacking permissions).
  我已为此 PR 添加了适当的标签（如无权限或需要的标签不存在，请在描述中说明，管理员将后续处理）。
• I have requested review from relevant code authors using the "Request review" feature when applicable.
  我已在适当情况下使用"Request review"功能请求相关代码作者进行审查。
• I have updated the repository accordingly (If it’s needed).
  我已相应更新了相关仓库（若适用）。
  • OpenList-Frontend #XXXX
  • OpenList-Docs #XXXX

[xrgzs]

测试没问题，能将 null 解析成 0：

package template

import (
	"testing"

	"github.com/OpenListTeam/OpenList/v4/pkg/utils"
)

func TestJP(t *testing.T) {
	jsonStr := `{"map": {"vipSize": null}}`

	val := utils.Json.Get([]byte(jsonStr), "map", "vipSize").ToUint64()
	t.Logf("解析结果：%d (类型：%T)\n", val, val)

	// must be 0
	if val != 0 {
		t.Errorf("期望值 0，实际值 %d", val)
	}
}

Running tool: /opt/homebrew/bin/go test -timeout 30s -run ^TestJP$ github.com/OpenListTeam/OpenList/v4/drivers/ilanzou

=== RUN   TestJP
    /Users/x/project/OpenList/drivers/ilanzou/util_test.go:13: 解析结果：0 (类型：uint64)
--- PASS: TestJP (0.00s)
PASS
ok      github.com/OpenListTeam/OpenList/v4/drivers/ilanzou     (cached)

[KirCute]

测试没问题，能将 null 解析成 0：

package template

import (
	"testing"

	"github.com/OpenListTeam/OpenList/v4/pkg/utils"
)

func TestJP(t *testing.T) {
	jsonStr := `{"map": {"vipSize": null}}`

	val := utils.Json.Get([]byte(jsonStr), "map", "vipSize").ToUint64()
	t.Logf("解析结果：%d (类型：%T)\n", val, val)

	// must be 0
	if val != 0 {
		t.Errorf("期望值 0，实际值 %d", val)
	}
}

Running tool: /opt/homebrew/bin/go test -timeout 30s -run ^TestJP$ github.com/OpenListTeam/OpenList/v4/drivers/ilanzou

=== RUN   TestJP
    /Users/x/project/OpenList/drivers/ilanzou/util_test.go:13: 解析结果：0 (类型：uint64)
--- PASS: TestJP (0.00s)
PASS
ok      github.com/OpenListTeam/OpenList/v4/drivers/ilanzou     (cached)

能不能把vipSize不存在的情况解析为0

[xrgzs]

能不能把vipSize不存在的情况解析为0

试了下没问题

func TestNotExist(t *testing.T) {
	jsonStr := `{"map": {"vipSize2": null}}`

	val := utils.Json.Get([]byte(jsonStr), "map", "vipSize").ToUint64()
	t.Logf("解析结果：%d (类型：%T)\n", val, val)

	// must be 0
	if val != 0 {
		t.Errorf("期望值 0，实际值 %d", val)
	}
}

Running tool: /opt/homebrew/bin/go test -timeout 30s -run ^TestNotExist$ github.com/OpenListTeam/OpenList/v4/drivers/ilanzou

=== RUN   TestNotExist
    /Users/x/project/OpenList/drivers/ilanzou/util_test.go:25: 解析结果：0 (类型：uint64)
--- PASS: TestNotExist (0.00s)
PASS
ok      github.com/OpenListTeam/OpenList/v4/drivers/ilanzou     0.208s