Parse env vars and args from debug launch editor (#30538)

Release Notes:

- debugger: allow setting env vars and arguments on the launch command.

---------

Co-authored-by: Cole Miller <m@cole-miller.net>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/dap_adapters/src/php.rs

@@ -29,6 +29,7 @@ impl PhpDebugAdapter {
                     "program": launch_config.program,
                     "cwd": launch_config.cwd,
                     "args": launch_config.args,
+                    "env": launch_config.env_json(),
                     "stopOnEntry": config.stop_on_entry.unwrap_or_default(),
                 }),
                 request: config.request.to_dap(),