ci: prevent duplicate workflow runs for xgopilot branches

Add !xgopilot/** exclusion pattern to all workflow trigger configurations,
matching the existing dependabot pattern. This ensures that xgopilot branches
only trigger CI checks on pull_request events, eliminating redundant push
event triggers.

Fixes #1340

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/doc.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - "**"
       - "!dependabot/**"
+      - "!xgopilot/**"
   pull_request:
     branches: ["**"]
 

.github/workflows/fmt.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - "**"
       - "!dependabot/**"
+      - "!xgopilot/**"
   pull_request:
     branches: ["**"]
 

.github/workflows/go.yml

@@ -8,6 +8,7 @@ on:
     branches:
       - "**"
       - "!dependabot/**"
+      - "!xgopilot/**"
   pull_request:
     branches: ["**"]
 

.github/workflows/llgo.yml

@@ -8,6 +8,7 @@ on:
     branches:
       - "**"
       - "!dependabot/**"
+      - "!xgopilot/**"
   pull_request:
     branches: ["**"]
 

.github/workflows/release-build.yml

@@ -2,7 +2,10 @@ name: Release Build
 
 on:
   push:
-    branches: ["**"]
+    branches:
+      - "**"
+      - "!dependabot/**"
+      - "!xgopilot/**"
     tags: ["*"]
   pull_request:
     branches: ["**"]

.github/workflows/targets.yml

@@ -6,6 +6,7 @@ on:
     branches:
       - "**"
       - "!dependabot/**"
+      - "!xgopilot/**"
   pull_request:
     branches: ["**"]