Add LDAP authentication (#470)

* Introduce basic LDAP authentication.

* Reformat LDAP code; use ldap in Git HTTP

* lint

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Co-authored-by: Santhosh Raju <santhosh.raju@gmail.com>

.gitignore

@@ -1,6 +1,7 @@
 node_modules/
 gist.db
 .idea/
+.vscode/
 .DS_Store
 /**/.DS_Store
 public/assets/*
@@ -10,4 +11,5 @@ opengist
 build/
 docs/.vitepress/dist/
 docs/.vitepress/cache/
-helm/opengist/charts/
+helm/opengist/charts/
+vendor/