Update content scope scripts to version 15.7.0 (#9017)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/414730916066338/task/1216063953891872

- Automated content scope scripts dependency update

This PR updates the content scope scripts dependency to the latest
available version and copies the necessary files.

Tests will only run if something has changed in the
`node_modules/@duckduckgo/content-scope-scripts` folder.

If only the package version has changed, there is no need to run the
tests.

If tests have failed, see
https://app.asana.com/0/1202561462274611/1203986899650836/f for further
information on what to do next.

_`content-scope-scripts` folder update_
- [ ] All tests must pass
- [ ] Privacy tests must pass

_Only `content-scope-scripts` package update_
- [ ] All tests must pass
- [ ] Privacy tests do not need to run

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Changes injected page scripts used for autofill and broker protection;
incorrect event/value handling on sites could affect form filling,
though the change is narrowly scoped to TEXTAREA support.
> 
> **Overview**
> Bumps **`@duckduckgo/content-scope-scripts`** from **15.6.0** to
**15.7.0** in `package.json` and refreshes the lockfile (including the
resolved git commit and minor transitive bumps such as `@types/node` and
`immutable-json-patch`).
> 
> The updated Android bundles **`autofillImport.js`** and
**`brokerProtection.js`** extend **`setValueForInput`** so
**`TEXTAREA`** fields are supported: it uses `HTMLTextAreaElement`’s
native value setter and runs the same keydown/input/keyup/change
dispatch path as **`INPUT`**, instead of failing as an unsupported tag.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
a221c04. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Co-authored-by: daxmobile <daxmobile@users.noreply.github.com>

Author: daxmobile

node_modules/@duckduckgo/content-scope-scripts/build/android/autofillImport.js

@@ -15,7 +15,7 @@
   "dependencies": {
     "@duckduckgo/autoconsent": "^14.95.0",
     "@duckduckgo/autofill": "github:duckduckgo/duckduckgo-autofill#19.0.0",
-    "@duckduckgo/content-scope-scripts": "github:duckduckgo/content-scope-scripts#15.6.0",
+    "@duckduckgo/content-scope-scripts": "github:duckduckgo/content-scope-scripts#15.7.0",
     "@duckduckgo/privacy-dashboard": "github:duckduckgo/privacy-dashboard#9.0.0",
     "@duckduckgo/privacy-reference-tests": "github:duckduckgo/privacy-reference-tests#1766162897"
   }