fix(docs): typo in `Usage` section (numToStr#324)

feat: add `twig` support (numToStr#249)

Ref: https://twig.symfony.com/doc/3.x/templates.html#comments

feat: add `arduino` support (numToStr#181)

feat: support nested (injected) code blocks (numToStr#138)

This PR fixes commenting in nested (injected) code blocks. Like in markdown you can have multiple code blocks and those code blocks can also have injected languages for example `markdown -> vue -> css/js`

### Before

```vue
<style>
body {
    <!-- color: red; -->
}
</style>

<script>
while (true) {
    <!-- console.log("neovim is awesome!"); -->
}
</script>
```

### After

```vue
<style>
body {
    /* color: red; */
}
</style>

<script>
while (true) {
    // console.log("neovim is awesome!");
}
</script>
```

---

Closes numToStr#137