refactor: Remove timeout_minutes parameter from action (#482)

This change removes the custom timeout_minutes parameter from the action in favor of using GitHub Actions' native timeout-minutes feature.

Changes:
- Removed timeout_minutes input from action.yml and base-action/action.yml
- Removed all timeout handling logic from base-action/src/run-claude.ts
- Updated base-action/src/index.ts to remove timeoutMinutes parameter
- Removed timeout-related tests from base-action/test/run-claude.test.ts
- Removed timeout_minutes from all example workflow files (19 files)

Rationale:
- Simplifies the codebase by removing custom timeout logic
- Users can use GitHub Actions' native timeout-minutes at the job/step level
- Reduces complexity and maintenance burden
- Follows GitHub Actions best practices

BREAKING CHANGE: The timeout_minutes parameter is no longer supported. Users should use GitHub Actions' native timeout-minutes instead.

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

Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/test-settings.yml

@@ -26,7 +26,6 @@ jobs:
                 "allow": ["Bash(echo:*)"]
               }
             }
-          timeout_minutes: "2"
 
       - name: Verify echo worked
         run: |
@@ -76,7 +75,6 @@ jobs:
                 "deny": ["Bash(echo:*)"]
               }
             }
-          timeout_minutes: "2"
 
       - name: Verify echo was denied
         run: |
@@ -114,7 +112,6 @@ jobs:
             Use Bash to echo "Hello from settings file test"
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           settings: "test-settings.json"
-          timeout_minutes: "2"
 
       - name: Verify echo worked
         run: |
@@ -169,7 +166,6 @@ jobs:
             Use Bash to echo "This should not work from file"
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           settings: "test-settings.json"
-          timeout_minutes: "2"
 
       - name: Verify echo was denied
         run: |