Add vscode-gitlens to the plugin registry (#476)

* Add vscode-gitlens to the plugin registry

With eclipse-theia/theia#4902 being resolved we can
now use gitlens in Che. The work in Theia is new, so to test you may need
to select theia:next as your editor (instead of latest).

Closes eclipse-che/che#16341

Signed-off-by: Eric Williams <ericwill@redhat.com>

v3/plugins/eamodio/vscode-gitlens/10.2.1/meta.yaml

@@ -0,0 +1,15 @@
+apiVersion: v2
+publisher: eamodio
+name: vscode-gitlens
+version: 10.2.1
+type: VS Code extension
+displayName: GitLens
+title: GitLens
+description: Supercharge the Git capabilities built into Visual Studio Code — Visualize code authorship at a glance via Git blame annotations and code lens, seamlessly navigate and explore Git repositories, gain valuable insights via powerful comparison commands, and so much more
+icon: https://raw.githubusercontent.com/eamodio/vscode-gitlens/master/images/gitlens-icon.png
+repository: https://github.com/eamodio/vscode-gitlens
+category: Other
+firstPublicationDate: '2020-05-26'
+spec:
+  extensions:
+    - https://download.jboss.org/jbosstools/vscode/3rdparty/vscode-gitlens/gitlens-10.2.1.vsix

v3/plugins/eamodio/vscode-gitlens/latest.txt

@@ -0,0 +1 @@
+10.2.1