docs: fix heirarchy in docs and use workspaceFolder inplace of CWD

Author: ravitemer

.mcphub/servers.json

@@ -4,7 +4,7 @@
       "args": [
         "-y",
         "@modelcontextprotocol/server-filesystem",
-        "${CWD}"
+        "${workspaceFolder}"
       ],
       "command": "npx"
     },
@@ -21,7 +21,7 @@
     "lsp": {
       "args": [
         "--workspace",
-        "${CWD}",
+        "${workspaceFolder}",
         "--lsp",
         "lua-language-server",
         "--",

doc/mcp/servers_json.md

@@ -321,7 +321,7 @@ MCPHub supports the following VS Code predefined variables:
 - These variables are available for placeholder resolution but are NOT passed to server environments
 - Use them in any configuration field: `command`, `args`, `env`, `url`, `headers`, `cwd`
 
-### VS Code Input Variables Support
+## VS Code Input Variables Support
 
 MCPHub supports VS Code's `${input:variable-id}` syntax for compatibility with VS Code configurations. Input variables are configured via MCPHub's `global_env` option and made available to all servers.