feat: extensions check + resolver

server/modules/extensions/git/ext.js

@@ -0,0 +1,20 @@
+const cmdExists = require('command-exists')
+
+module.exports = {
+  key: 'git',
+  title: 'Git',
+  description: 'Distributed version control system. Required for the Git storage module.',
+  isInstalled: false,
+  async isCompatible () {
+    return true
+  },
+  async check () {
+    try {
+      await cmdExists('git')
+      this.isInstalled = true
+    } catch (err) {
+      this.isInstalled = false
+    }
+    return this.isInstalled
+  }
+}