[Feature] Add a command palette entry to view documentation.

This commit adds an entry to the command palette (just like main menu) to
view the documentation.

Author: UltraInstinct05

resources/CommandsBrowser.sublime-commands

@@ -17,6 +17,13 @@
         "caption": "CommandsBrowser: Browse available Plugin/Package commands.",
         "command": "commands_browser_plugin_commands_33",
     },
+    {
+        "caption": "CommandsBrowser: View Documentation.",
+        "command": "open_url",
+        "args": {
+            "url": "https://github.com/Sublime-Instincts/CommandsBrowser#readme"
+        },
+    },
     {
         "caption": "Preferences: CommandsBrowser Settings.",
         "command": "edit_settings",