feat(go/graph): add go code for graph_dfs/bfs (#372)

* feat(vertex): add a vertex pkg

* feat(graph): add graph_bfs in go

* feat(graph): add graph_dfs in go

* fix(graph): fix comment

* fix(graph): fix graph_adj_list

* fix(go/graph): fix graph_adjacency

* fix(c): gitignore

* feat(graph): print order adjList graph

* fix(graph): remove order print

* Update graph_adjacency_list_test.go

* Update .gitignore

* Update .gitignore

---------

Co-authored-by: Yudong Jin <krahets@163.com>

.gitignore

@@ -3,7 +3,7 @@
 
 # Editor
 .vscode/
-.idea/
+**/.idea
 
 # mkdocs files
 .cache/
@@ -13,3 +13,4 @@ docs/overrides/
 build/
 site/
 utils/
+**/cmake-build-debug