Adding Orchestration And Developer Best Practices For Connector Skill

[mbanjan94]

• The Skill used to recommend scheduledTrigger for refreshing the data, but since Orchestration is now GA. Changing the skill to use orchestration and taskRunner functions. More info - https://developer.atlassian.com/platform/teamwork-graph/orchestration-for-forge-connectors/
• Also added the developer best practices as per - https://developer.atlassian.com/platform/teamwork-graph/connector-requirements-and-best-practices/

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