docs: open-source ready README with full toolsets catalog, LICENSE, architecture

Prepare for HF Spaces deployment: root Dockerfile, persistent /data volume, YAML frontmatter

feat: AuroraCoder-styled management UI, light mode default, auth fix

Revamp READMEs: position as universal meta-tool (pip for AI agents)

docs: comprehensive open-source README

feat(native_tool): support bulk OpenAI schema export via tool_names parameter

fix(management): shift UI from 'create from scratch' to 'connect to existing / register from file'

AgentToolStore v2: MCP client + Skills manager + MCP server + Registry