Add GitHub Actions workflow to build and deploy plugin to OMCSI

[Copilot]

Adds a CI/CD workflow that builds the plugin JAR and deploys it to an omcsi instance, modeled after the Activity Tracker deploy workflow.

• Triggers: Push to DEPLOY_BRANCH (default: main) + manual workflow_dispatch
• Build: JDK 8 (temurin), installs Ponder from dependencies/ dir, then mvn --batch-mode clean package
• JAR resolution: Finds shaded JAR in target/, excludes original-*/*-sources.jar/*-javadoc.jar
• Deploy: POSTs JAR to OMCSI_DEPLOY_URL/api/plugins/deploy with bearer auth
• Error handling: Distinct messages for missing variables, 401 auth failures, 400 bad requests, network errors

The only deviation from the reference workflow is an additional step to mvn install:install-file the Ponder dependency, which isn't available from any public Maven repository.

Required repo configuration

Secrets
OMCSI_DEPLOY_URL	Base URL of the omcsi instance
OMCSI_DEPLOY_TOKEN	DEPLOY_AUTH_TOKEN from omcsi .env

Variables
PLUGIN_JAR_NAME	Target filename on server, e.g. SimpleSkills.jar
DEPLOY_BRANCH	Branch that triggers deploys (optional, default: main)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add GitHub Actions workflow to build and deploy plugin to OMCSI</issue_title>
<issue_description>## Summary

Add a .github/workflows/deploy.yml file that automatically builds the plugin JAR and deploys it to the omcsi (open-mc-server-infrastructure) instance when changes are pushed to the deploy branch.

Implementation

Create .github/workflows/deploy.yml modeled after the Activity Tracker reference workflow with the following adjustments for this project:

• JDK version: [8 / 11 / 17 / 21]
• Build tool & command:
  • Maven: mvn --batch-mode package
  • Gradle: ./gradlew build
• JAR location:
  • Maven: target/ (exclude original-*, *-sources.jar, *-javadoc.jar)
  • Gradle: build/libs/ (exclude *-sources.jar, *-javadoc.jar)

Required Secrets

Add via repo Settings → Secrets and variables → Actions:

Secret	Value
OMCSI_DEPLOY_URL	Base URL of the omcsi instance, e.g. https://mc.example.com:8092
OMCSI_DEPLOY_TOKEN	Value of DEPLOY_AUTH_TOKEN from the omcsi .env file

Required Variables

Add via repo Settings → Secrets and variables → Actions → Variables:

Variable	Value
PLUGIN_JAR_NAME	Filename of the JAR on the server, e.g. MyPlugin.jar
DEPLOY_BRANCH	Branch that triggers deploys (default: main)

Acceptance Criteria

• .github/workflows/deploy.yml exists in the repo
• Pushing to the deploy branch triggers a build and successful deploy
• Workflow can also be triggered manually via the Actions tab (workflow_dispatch)
• Failed builds, missing variables, auth errors, and bad requests all produce a clear error message and non-zero exit code
• Secrets and variables documented in this ticket are configured in the repo

Reference

• Working example: Dans-Plugins/Activity-Tracker — .github/workflows/deploy.yml
• omcsi project: dmccoystephenson/open-mc-server-infrastructure
  </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add GitHub Actions workflow to build and deploy plugin to OMCSI #140

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