Merges Bitbucket PRs using API

(#4046, #4099)

Author: sergeibbb

src/plus/integrations/providers/bitbucket.ts

@@ -35,13 +35,17 @@ export class BitbucketIntegration extends HostingIntegration<
 	}
 
 	protected override async mergeProviderPullRequest(
-		_session: AuthenticationSession,
-		_pr: PullRequest,
-		_options?: {
+		{ accessToken }: AuthenticationSession,
+		pr: PullRequest,
+		options?: {
 			mergeMethod?: PullRequestMergeMethod;
 		},
 	): Promise<boolean> {
-		return Promise.resolve(false);
+		const api = await this.getProvidersApi();
+		return api.mergePullRequest(this.id, pr, {
+			accessToken: accessToken,
+			mergeMethod: options?.mergeMethod,
+		});
 	}
 
 	protected override async getProviderAccountForCommit(

src/plus/integrations/providers/providersApi.ts

@@ -36,6 +36,7 @@ import type {
 	GetReposForAzureProjectFn,
 	GetReposOptions,
 	IssueFilter,
+	MergePullRequestFn,
 	PageInfo,
 	PagingMode,
 	ProviderAccount,
@@ -207,6 +208,9 @@ export class ProvidersApi {
 				getPullRequestsForRepoFn: providerApis.bitbucket.getPullRequestsForRepo.bind(
 					providerApis.bitbucket,
 				) as GetPullRequestsForRepoFn,
+				mergePullRequestFn: providerApis.bitbucket.mergePullRequest.bind(
+					providerApis.bitbucket,
+				) as MergePullRequestFn,
 			},
 			[HostingIntegrationId.AzureDevOps]: {
 				...providersMetadata[HostingIntegrationId.AzureDevOps],