feat: add copilot_code_review rule support to repository rulesets

Add support for GitHub's Copilot code review feature in repository
rulesets, allowing automatic code review requests for pull requests.

Changes:
- Add RulesetRuleTypeCopilotCodeReview constant to rule types
- Add CopilotCodeReviewRuleParameters struct with review_new_pushes
  and review_draft_pull_requests fields
- Implement marshal/unmarshal logic for copilot_code_review rules
- Add comprehensive test coverage for the new rule type

The copilot_code_review rule supports two configuration options:
- review_new_pushes: Automatically review each new push to the PR
- review_draft_pull_requests: Automatically review draft PRs

Author: Jiayang Zhou

github/rules.go

@@ -981,14 +981,14 @@ func (r *RepositoryRulesetRules) UnmarshalJSON(data []byte) error {
 					return err
 				}
 			}
-case RulesetRuleTypeCopilotCodeReview:
-r.CopilotCodeReview = &CopilotCodeReviewRuleParameters{}
+		case RulesetRuleTypeCopilotCodeReview:
+			r.CopilotCodeReview = &CopilotCodeReviewRuleParameters{}
 
-if w.Parameters != nil {
-if err := json.Unmarshal(w.Parameters, r.CopilotCodeReview); err != nil {
-return err
-}
-}
+			if w.Parameters != nil {
+				if err := json.Unmarshal(w.Parameters, r.CopilotCodeReview); err != nil {
+					return err
+				}
+			}
 		case RulesetRuleTypeRepositoryCreate:
 			r.RepositoryCreate = &EmptyRuleParameters{}
 		case RulesetRuleTypeRepositoryDelete:

github/rules_test.go

@@ -122,10 +122,10 @@ func TestRulesetRules(t *testing.T) {
 						},
 					},
 				},
-CopilotCodeReview: &CopilotCodeReviewRuleParameters{
-ReviewNewPushes:         true,
-ReviewDraftPullRequests: false,
-},
+				CopilotCodeReview: &CopilotCodeReviewRuleParameters{
+					ReviewNewPushes:         true,
+					ReviewDraftPullRequests: false,
+				},
 				RepositoryCreate:     &EmptyRuleParameters{},
 				RepositoryDelete:     &EmptyRuleParameters{},
 				RepositoryName:       &SimplePatternRuleParameters{Pattern: "^test-.+", Negate: false},
@@ -244,10 +244,10 @@ ReviewDraftPullRequests: false,
 						},
 					},
 				},
-CopilotCodeReview: &CopilotCodeReviewRuleParameters{
-ReviewNewPushes:         true,
-ReviewDraftPullRequests: false,
-},
+				CopilotCodeReview: &CopilotCodeReviewRuleParameters{
+					ReviewNewPushes:         true,
+					ReviewDraftPullRequests: false,
+				},
 				RepositoryCreate:     &EmptyRuleParameters{},
 				RepositoryDelete:     &EmptyRuleParameters{},
 				RepositoryName:       &SimplePatternRuleParameters{Pattern: "^test-.+", Negate: false},