docs(config): new features (#707)

* docs(config): new features

* fix: grammar

Author: KSXGitHub

docs/cli/config.md

@@ -24,10 +24,54 @@ The global configuration file is located at one of the following locations:
 
 Set the config key to the value provided.
 
+Without the `--json` flag, it parses the value as plain string:
+
+```sh
+pnpm config set --location=project nodeVersion 22.0.0
+```
+
+With the `--json` flag, it parses the value as JSON:
+
+```sh
+pnpm config set --location=project --json nodeVersion '"22.0.0"'
+```
+
+The `--json` flag also allows `pnpm config set` to create arrays and objects:
+
+```sh
+pnpm config set --location=project --json onlyBuiltDependencies '["react", "react-dom"]'
+pnpm config set --location=project --json catalog '{ "react": "19" }'
+```
+
+The `set` command does not accept a property path.
+
 ### get <key>
 
 Print the config value for the provided key.
 
+The `key` can be a simple key:
+
+```sh
+pnpm config get nodeVersion
+pnpm config get --json nodeVersion
+pnpm config get --json packageExtensions
+pnpm config get --json onlyBuiltDependencies
+pnpm config get --json catalog
+```
+
+It can also be a property path:
+
+```sh
+pnpm config get 'packageExtensions["@babel/parser"].peerDependencies["@babel/types"]'
+pnpm config get --json 'packageExtensions["@babel/parser"].peerDependencies["@babel/types"]'
+pnpm config get 'onlyBuiltDependencies[0]'
+pnpm config get --json 'onlyBuiltDependencies[0]'
+pnpm config get catalog.react
+pnpm config get --json catalog.react
+```
+
+The syntax of the property path emulates JavaScript property paths.
+
 ### delete <key>
 
 Remove the config key from the config file.
@@ -50,5 +94,4 @@ When set to `global`, the performance is the same as setting the `--global` opti
 
 ### --json
 
-Show all the config settings in JSON format.
-
+Make `get` and `list` show all the config settings in JSON format and make `set` parse the value as JSON.