`Undefined Step` warning for step when corresponding step definition string contains an escaped forward slash

### 👓 What did you see?

Thanks for maintaining `@cucumber/language-server`! It's been a breeze to use and I really enjoy using it.

This behavior could be expected (and a weird edge case if anything), but I noticed a small issue where, when a step in a `.feature` file contains a forward slash, the corresponding step definition glue code isn't found by the language server, even when [`@cucumber/cucumber`](https://www.npmjs.com/package/@cucumber/cucumber) can successfully locate the corresponding step definition when the tests are run.

`features/config.feature`

```cucumber
Feature: Simple test

Scenario: GET /config
Given I am a user
# Notice `/config` with a forward slash prefix
When I send a request to /config
Then the response should contain expected config
```

`features/config.ts`

```typescript
import { Given, Then, When } from '@cucumber/cucumber';

Given('I am a user', async function () {
// no-op
});

// Notice the escaped forward slash - which is a requirement for `@cucumber/cucumber` to match this step definition to the step referenced in the feature file.
When('I send a request to \\/config{}', async function (value: string) {
// eslint-disable-next-line no-console
console.log(`Sending request to ${value}`);
});

Then('the response should contain expected config', async function () {
// no-op
});
```

### ✅ What did you expect to see?

I would expect that `@cucumber/language-server` could locate a step definition for a feature step with a forward slash, when `@cucumber/cucumber` is able to match the step definition to this step and run tests as expected.

### 📦 Which tool/library version are you using?

```bash
❯ node -v
v24.10.0
```

`@cucumber/cucumber`: 12.1.0
`@cucumber/language-server`: 1.7.0

```bash
❯ uname -v
Darwin Kernel Version 25.0.0: Wed Sep 17 21:42:08 PDT 2025; root:xnu-12377.1.9~141/RELEASE_ARM64_T8132
```

```bash
❯ nvim --version
NVIM v0.11.4
Build type: Release
LuaJIT 2.1.1761727121
```

### 🔬 How could we reproduce it?

Clone this reproduction repository, install dependencies, run the test suite, and verify that all tests run as expected.

```bash
git clone https://github.com/Drew-Daniels/cucumber-lsp-repro
cd cucumber-lsp-repro
npm i
npm run cucumber
```

However, open up [`features/simple-maths.feature`](https://github.com/Drew-Daniels/cucumber-lsp-repro/blob/main/features/simple-maths.feature) in your editor (I am using `neovim`) and verify that the LSP generates a warning that the step definition for the `When I send a request to /config` line cannot be found.

### 📚 Any additional context?

Here is my (abbreviated) `nvim-lspconfig.lua` file:

```lua
return {
"neovim/nvim-lspconfig",
config = function(_, _)
local capabilities = require("blink.cmp").get_lsp_capabilities()
-- TODO: Modularize configuration so that 'capabilities = capabilities' setting is used for every lsp
--TODO: Deactivate eslint lsp when in an "ignored" directory so things are less noisy
-- https://github.com/neovim/nvim-lspconfig/issues/2508
local root_dir = vim.fs.root(0, ".git")
local use_flat_config = false
if root_dir ~= nil and vim.fn.filereadable(root_dir .. "/eslint.config.js") == 1 then
use_flat_config = true
end

vim.lsp.config("cucumber_language_server", {
capabilities = capabilities,
settings = {
cucumber = {
glue = {
-- Cucumber-JVM
"src/test/**/*.java",
-- Cucumber-Js
"features/**/*.ts",
"features/**/*.tsx",
"features/**/*.js",
"features/**/*.jsx",
"step-definitions/**/*.ts",
"test/features/**/*.ts",
-- Behat
"features/**/*.php",
-- Behave
"features/**/*.py",
-- Pytest-BDD
"tests/**/*.py",
-- Cucumber Rust
"tests/**/*.rs",
"features/**/*.rs",
-- Cucumber-Ruby
"features/**/*.rb",
-- SpecFlow
"*specs*/**/*.cs",
-- Godog
"features/**/*_test.go",
},
},
},
})

vim.lsp.enable({
"cucumber_language_server",
})
end,
}
```