AxisVela Open v0.1.0

AxisVela Open v0.1.0

First complete public snapshot of the AxisVela Open documentation and project
index.

• Six sections: products and projects, agent theory, agent architecture, agent
  practice, concepts and terminology, and reference.
• 25 projects indexed in projects.yaml.
• Full English and Chinese documentation.
• Agent theory grounded in Huiwen Han’s research, with DOI links.
• MkDocs site: https://axisvela.github.io/axisvela-open/

This tag versions the documentation and index, not the individual projects. See
CHANGELOG.md
for details.