Upgrade github action/run-gemini-cli workflows.

[fujitatomoya]

https://github.com/google-gemini/gemini-cli-action has been archived, upgrade the workflow files with https://github.com/google-github-actions/run-gemini-cli

[github-actions]

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[github-actions]

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[Copilot]

Pull request overview

This PR upgrades the GitHub Actions workflows from the archived google-gemini/gemini-cli-action to the new google-github-actions/run-gemini-cli action. The migration involves restructuring the workflows into a more modular design and introducing command configuration files.

Key Changes

• Replaced references from archived action to the new google-github-actions/run-gemini-cli@v0
• Introduced new modular workflow architecture with separate reusable workflows for review, triage, and invoke operations
• Added .github/commands/*.toml files to configure prompts for different Gemini operations
• Updated .gitignore to exclude Gemini-related temporary files

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
.gitignore	Added entries to ignore Gemini telemetry directory and credential files
.github/workflows/gemini-triage.yml	New reusable workflow for triaging individual issues
.github/workflows/gemini-scheduled-triage.yml	New scheduled workflow for batch issue triage
.github/workflows/gemini-review.yml	New reusable workflow for pull request reviews
.github/workflows/gemini-invoke.yml	New reusable workflow for general Gemini CLI invocations
.github/workflows/gemini-dispatch.yml	New dispatcher workflow that routes requests to appropriate sub-workflows
.github/workflows/gemini-pr-review.yml	Removed old PR review workflow (replaced by new architecture)
.github/workflows/gemini-issue-scheduled-triage.yml	Removed old scheduled triage workflow (replaced by new version)
.github/workflows/gemini-issue-automated-triage.yml	Removed old automated triage workflow (replaced by new architecture)
.github/workflows/gemini-cli.yml	Removed old general CLI workflow (replaced by new architecture)
.github/commands/gemini-triage.toml	New command configuration for issue triage operations
.github/commands/gemini-scheduled-triage.toml	New command configuration for scheduled batch triage
.github/commands/gemini-review.toml	New command configuration for PR review operations
.github/commands/gemini-invoke.toml	New command configuration for general AI assistant tasks

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[fujitatomoya]

these files are auto-generated by gemini-cli, so i will not address copilot comments on them.

[fujitatomoya]

https://github.com/fujitatomoya/ros2ai/actions/runs/20706007302/job/59436711015?pr=81 is not related to this fix, but gemini API.