Infra Enhancement: Create GitHub action to automatically create the bi-weekly meeting issue

[frankkilcommins]

Create a GitHub action to automatically create our recurring TDC bi-weekly meeting.

Rules:

• run every second Monday to create the next meeting issue (e.g. Wednesday of the following week)
• pin the issue
• labels: meetings, house-keeping
• template: https://github.com/OAI/Arazzo-Specification/blob/main/.github/templates/agenda.md

Sample action: https://github.com/OAI/OpenAPI-Specification/blob/main/.github/workflows/agenda.yaml