feat: add flowstudio-power-automate-debug and flowstudio-power-automate-build skills (#899)

* feat: add flowstudio-power-automate-debug and flowstudio-power-automate-build skills

Two companion skills for the FlowStudio Power Automate MCP server:

- flowstudio-power-automate-debug: Debug workflow for failed Power Automate cloud flow runs
- flowstudio-power-automate-build: Build & deploy flows from natural language descriptions

Both require a FlowStudio MCP subscription: https://flowstudio.app
These complement the existing flowstudio-power-automate-mcp skill (merged in PR #896).

* fix: address all review comments — README, cross-refs, response shapes, step numbering

- Add skills to docs/README.skills.md (fixes validate-readme CI check)
- Update cross-skill references to use flowstudio- prefix (#1, #4, #7, #9)
- Fix get_live_flow_run_action_outputs: returns array, index [0] (#2, #3)
- Renumber Step 6→5, Step 7→6 — remove gap in build workflow (#8)
- Fix connectionName note: it's the key, not the GUID (#10)
- Remove invalid arrow function from Filter array expression (#11)

* feat: add flowstudio-power-automate plugin bundling all 3 skills

Plugin bundles:
- flowstudio-power-automate-mcp (core connection & CRUD)
- flowstudio-power-automate-debug (debug failed runs)
- flowstudio-power-automate-build (build & deploy flows)

Install: copilot plugin install flowstudio-power-automate@awesome-copilot

Per @aaronpowell's suggestion in review.

skills/flowstudio-power-automate-build/references/build-patterns.md

@@ -0,0 +1,108 @@
+# Common Build Patterns
+
+Complete flow definition templates ready to copy and customize.
+
+---
+
+## Pattern: Recurrence + SharePoint list read + Teams notification
+
+```json
+{
+  "triggers": {
+    "Recurrence": {
+      "type": "Recurrence",
+      "recurrence": { "frequency": "Day", "interval": 1,
+                       "startTime": "2026-01-01T08:00:00Z",
+                       "timeZone": "AUS Eastern Standard Time" }
+    }
+  },
+  "actions": {
+    "Get_SP_Items": {
+      "type": "OpenApiConnection",
+      "runAfter": {},
+      "inputs": {
+        "host": {
+          "apiId": "/providers/Microsoft.PowerApps/apis/shared_sharepointonline",
+          "connectionName": "shared_sharepointonline",
+          "operationId": "GetItems"
+        },
+        "parameters": {
+          "dataset": "https://mytenant.sharepoint.com/sites/mysite",
+          "table": "MyList",
+          "$filter": "Status eq 'Active'",
+          "$top": 500
+        }
+      }
+    },
+    "Apply_To_Each": {
+      "type": "Foreach",
+      "runAfter": { "Get_SP_Items": ["Succeeded"] },
+      "foreach": "@outputs('Get_SP_Items')?['body/value']",
+      "actions": {
+        "Post_Teams_Message": {
+          "type": "OpenApiConnection",
+          "runAfter": {},
+          "inputs": {
+            "host": {
+              "apiId": "/providers/Microsoft.PowerApps/apis/shared_teams",
+              "connectionName": "shared_teams",
+              "operationId": "PostMessageToConversation"
+            },
+            "parameters": {
+              "poster": "Flow bot",
+              "location": "Channel",
+              "body/recipient": {
+                "groupId": "<team-id>",
+                "channelId": "<channel-id>"
+              },
+              "body/messageBody": "Item: @{items('Apply_To_Each')?['Title']}"
+            }
+          }
+        }
+      },
+      "operationOptions": "Sequential"
+    }
+  }
+}
+```
+
+---
+
+## Pattern: HTTP trigger (webhook / Power App call)
+
+```json
+{
+  "triggers": {
+    "manual": {
+      "type": "Request",
+      "kind": "Http",
+      "inputs": {
+        "schema": {
+          "type": "object",
+          "properties": {
+            "name": { "type": "string" },
+            "value": { "type": "number" }
+          }
+        }
+      }
+    }
+  },
+  "actions": {
+    "Compose_Response": {
+      "type": "Compose",
+      "runAfter": {},
+      "inputs": "Received: @{triggerBody()?['name']} = @{triggerBody()?['value']}"
+    },
+    "Response": {
+      "type": "Response",
+      "runAfter": { "Compose_Response": ["Succeeded"] },
+      "inputs": {
+        "statusCode": 200,
+        "body": { "status": "ok", "message": "@{outputs('Compose_Response')}" }
+      }
+    }
+  }
+}
+```
+
+Access body values: `@triggerBody()?['name']`