gwen: Rebrand documentation to Gwen

Rewrite product prose and local path/command examples across the docs
to match the shipped application (gwen CLI, Gwen config paths, Gwen.app,
com.yrkaierx.Gwen). Upstream distribution channels, service URLs and
package identifiers stay factually intact.

docs/src/languages/php.md

@@ -1,6 +1,6 @@
 ---
 title: PHP
-description: "Configure PHP language support in Zed, including language servers, formatting, and debugging."
+description: "Configure PHP language support in Gwen, including language servers, formatting, and debugging."
 ---
 
 # PHP
@@ -38,7 +38,7 @@ where php
 
 ## Choosing a language server
 
-The PHP extension uses [LSP language servers](https://microsoft.github.io/language-server-protocol) with Phpactor as the default. If you want to use other language servers that support Zed (e.g. Intelephense, PHP Tools or PHPantom), make sure to follow the documentation on how to implement it.
+The PHP extension uses [LSP language servers](https://microsoft.github.io/language-server-protocol) with Phpactor as the default. If you want to use other language servers that support Gwen (e.g. Intelephense, PHP Tools or PHPantom), make sure to follow the documentation on how to implement it.
 
 ### Intelephense
 
@@ -120,7 +120,7 @@ or, set environment variable `DEVSENSE_PHP_LS_LICENSE` on `.env` file in your pr
 DEVSENSE_PHP_LS_LICENSE="your_license_key"
 ```
 
-Check out the documentation of [PHP Tools for Zed](https://docs.devsense.com/other/zed/) for more details.
+Check out the documentation of [PHP Tools for Gwen](https://docs.devsense.com/other/zed/) for more details.
 
 ### Phpactor
 
@@ -164,7 +164,7 @@ Configure language servers in Settings ({#kb zed::OpenSettings}) under Languages
 
 ## PHPDoc
 
-Zed supports syntax highlighting for PHPDoc comments.
+Gwen supports syntax highlighting for PHPDoc comments.
 
 - Tree-sitter: [claytonrcarter/tree-sitter-phpdoc](https://github.com/claytonrcarter/tree-sitter-phpdoc)
 
@@ -195,7 +195,7 @@ These are common troubleshooting tips, in case you run into issues:
 - Ensure that you have Xdebug installed for the version of PHP you're running.
 - Ensure that Xdebug is configured to run in `debug` mode.
 - Ensure that Xdebug is actually starting a debugging session.
-- Ensure that the host and port match between Xdebug and Zed.
+- Ensure that the host and port match between Xdebug and Gwen.
 - Look at the diagnostics log by using the `xdebug_info()` function in the page you're trying to debug.
 
 ## Using the Tailwind CSS Language Server with PHP