Add GitHub Workflows skill skeleton and build script

.gitignore

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+# Build output
+dist/

SKILL.md

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+---
+name: GitHub Workflows
+description: List and execute GitHub Actions workflow dispatch operations using the GitHub CLI
+tools:
+  - Bash
+---
+
+# GitHub Workflows Skill
+
+This skill enables listing and executing GitHub Actions workflow dispatch operations using the GitHub CLI (`gh`).
+
+## Prerequisites
+
+- GitHub CLI (`gh`) must be installed and available in PATH
+- User must be authenticated to GitHub via `gh auth login`
+
+## Listing Workflows
+
+To list all workflows in a repository:
+
+```bash
+gh workflow list
+```
+
+This displays workflow names, states, and IDs.
+
+To view details of a specific workflow, including whether it supports `workflow_dispatch`:
+
+```bash
+gh workflow view <workflow-name-or-id>
+```
+
+## Identifying Workflow Dispatch Workflows
+
+Workflows that support manual triggering have `workflow_dispatch` as a trigger event. To check if a workflow supports dispatch, examine the workflow file:
+
+```bash
+gh api repos/{owner}/{repo}/contents/.github/workflows/<workflow-file>.yml --jq '.content' | base64 -d | head -50
+```
+
+Or list workflows and look for those with a "workflow_dispatch" trigger in their definition.
+
+## Executing Workflow Dispatch
+
+To trigger a workflow dispatch:
+
+```bash
+gh workflow run <workflow-name-or-id>
+```
+
+To trigger with input parameters:
+
+```bash
+gh workflow run <workflow-name-or-id> -f param1=value1 -f param2=value2
+```
+
+To trigger on a specific branch:
+
+```bash
+gh workflow run <workflow-name-or-id> --ref <branch-name>
+```
+
+To trigger with inputs from a JSON file:
+
+```bash
+gh workflow run <workflow-name-or-id> --json < inputs.json
+```
+
+## Monitoring Workflow Runs
+
+After triggering a workflow, list recent runs:
+
+```bash
+gh run list --workflow=<workflow-name-or-id>
+```
+
+To watch a run in progress:
+
+```bash
+gh run watch <run-id>
+```
+
+To view run details:
+
+```bash
+gh run view <run-id>
+```
+
+To view run logs:
+
+```bash
+gh run view <run-id> --log
+```
+
+## Common Patterns
+
+### List all dispatchable workflows
+
+```bash
+gh workflow list | while read -r name state id; do
+  gh workflow view "$id" 2>/dev/null | grep -q "workflow_dispatch" && echo "$name ($id)"
+done
+```
+
+### Trigger and wait for completion
+
+```bash
+gh workflow run <workflow-name> && sleep 2 && gh run watch $(gh run list --workflow=<workflow-name> --limit 1 --json databaseId -q '.[0].databaseId')
+```

build.sh

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+#!/bin/bash
+# Build script for GitHub Workflows Claude Code Skill
+# Outputs a zip file containing the skill
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SKILL_NAME="github-workflows-skill"
+OUTPUT_DIR="${SCRIPT_DIR}/dist"
+OUTPUT_FILE="${OUTPUT_DIR}/${SKILL_NAME}.zip"
+
+# Create output directory if it doesn't exist
+mkdir -p "$OUTPUT_DIR"
+
+# Remove existing zip if present
+rm -f "$OUTPUT_FILE"
+
+# Create the zip file containing the skill
+cd "$SCRIPT_DIR"
+zip -r "$OUTPUT_FILE" SKILL.md
+
+echo "Skill package created: $OUTPUT_FILE"