docs: custom reporter path in --reporter option (microsoft#29585)

Fixes microsoft#29525

docs/src/test-cli-js.md

@@ -95,7 +95,7 @@ Complete set of Playwright Test options is available in the [configuration file]
 | `--project <name>` | Only run tests from the specified [projects](./test-projects.md), supports '*' wildcard. Defaults to running all projects defined in the configuration file.|
 | `--quiet` | Whether to suppress stdout and stderr from the tests. |
 | `--repeat-each <N>` | Run each test `N` times, defaults to one. |
-| `--reporter <reporter>` | Choose a reporter: minimalist `dot`, concise `line` or detailed `list`. See [reporters](./test-reporters.md) for more information. |
+| `--reporter <reporter>` | Choose a reporter: minimalist `dot`, concise `line` or detailed `list`. See [reporters](./test-reporters.md) for more information. You can also pass a path to a [custom reporter](./test-reporters.md#custom-reporters) file. |
 | `--retries <number>` | The maximum number of [retries](./test-retries.md#retries) for flaky tests, defaults to zero (no retries). |
 | `--shard <shard>` | [Shard](./test-parallel.md#shard-tests-between-multiple-machines) tests and execute only selected shard, specified in the form `current/all`, 1-based, for example `3/5`.|
 | `--tag <tag>` | Only run tests with a tag matching this tag expression. Learn more about [tagging](./test-annotations.md#tag-tests). |

docs/src/test-reporters-js.md

@@ -342,6 +342,13 @@ export default defineConfig({
   reporter: './my-awesome-reporter.ts',
 });
 ```
+
+Or just pass the reporter file path as `--reporter` command line option:
+
+```bash
+npx playwright test --reporter="./myreporter/my-awesome-reporter.ts"
+```
+
 ## Third party reporter showcase
 
 * [Allure](https://www.npmjs.com/package/allure-playwright)