Includes remote flag in merge base branch context

(#4443, #4522)

Author: sergeibbb

src/env/node/git/sub-providers/graph.ts

@@ -374,6 +374,7 @@ export class GraphGitSubProvider implements GitGraphSubProvider {
 									}),
 									mergeBase: mergeBase && {
 										...mergeBase,
+										remote: branchMap.get(mergeBase?.branch)?.remote ?? false,
 									},
 								},
 							};

src/webviews/plus/graph/graphWebview.ts

@@ -3259,6 +3259,7 @@ export class GraphWebviewProvider implements WebviewProvider<State, State, Graph
 				base: createReference(mergeBase.branch, ref.repoPath, {
 					refType: 'branch',
 					name: mergeBase.branch,
+					remote: mergeBase.remote,
 				}),
 				source: { source: 'graph' },
 			});

src/webviews/plus/graph/protocol.ts

@@ -567,7 +567,7 @@ export interface GraphIssueContextValue {
 export interface GraphBranchContextValue {
 	type: 'branch';
 	ref: GitBranchReference;
-	mergeBase?: { commit: string; branch: string };
+	mergeBase?: { commit: string; branch: string; remote: boolean };
 }
 
 export interface GraphCommitContextValue {