docs: update Base description to include all capabilities

[vaxin]

Summary

• Add missing capabilities (workflows, forms, roles & permissions) to the Base feature description
• Update across README.md, README.zh.md, and service_descriptions.json

Changes

File	Before	After
README.md	tables, fields, records, views, dashboards, data aggregation & analytics	+ workflows, forms, roles & permissions
README.zh.md	多维表格、字段、记录、视图、仪表盘，数据聚合分析	+ 自动化流程、表单、角色权限
service_descriptions.json	Table, field, record, and view management	+ dashboard, workflow, form, role & permission

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