feat: add github_organization_security_configuration and github_enterprise_security_configuration resources

Adds resources to manage Code Security Configurations at the organization
and enterprise level. Addresses all reviewer feedback from PR integrations#3143:

- Fixed go-github import to v82 (matching go.mod)
- Removed fmt.Sprintf from all tflog calls, using structured fields only
- Create/Update set Computed fields directly and return nil (no Read call)
- Added configuration_id Computed field for numeric API ID in State
- Update/Delete use d.Get() from State instead of parsing composite ID
- Simplified Import function, removed redundant buildID/SetId
- Extracted setState helpers to DRY up Computed field population
- Added unit tests for all util flatten functions

Resolves integrations#2412

Author: sprioriello

github/provider.go

@@ -180,6 +180,7 @@ func Provider() *schema.Provider {
 			"github_organization_role_user":                                         resourceGithubOrganizationRoleUser(),
 			"github_organization_role_team_assignment":                              resourceGithubOrganizationRoleTeamAssignment(),
 			"github_organization_ruleset":                                           resourceGithubOrganizationRuleset(),
+			"github_organization_security_configuration":                            resourceGithubOrganizationSecurityConfiguration(),
 			"github_organization_security_manager":                                  resourceGithubOrganizationSecurityManager(),
 			"github_organization_settings":                                          resourceGithubOrganizationSettings(),
 			"github_organization_webhook":                                           resourceGithubOrganizationWebhook(),
@@ -217,6 +218,7 @@ func Provider() *schema.Provider {
 			"github_enterprise_actions_workflow_permissions":                        resourceGithubEnterpriseActionsWorkflowPermissions(),
 			"github_actions_organization_workflow_permissions":                      resourceGithubActionsOrganizationWorkflowPermissions(),
 			"github_enterprise_security_analysis_settings":                          resourceGithubEnterpriseSecurityAnalysisSettings(),
+			"github_enterprise_security_configuration":                              resourceGithubEnterpriseSecurityConfiguration(),
 			"github_workflow_repository_permissions":                                resourceGithubWorkflowRepositoryPermissions(),
 		},