feat: Add menu entry to change cozy appearance

[JF-Cozy]

need https://github.com/cozy/cozy-ui/pull/2658 and https://github.com/cozy/cozy-bar/pull/847 first

ui.darkmode.enabled must be enabled

### ✨ Features

* Add menu entry to change cozy appearance (`ui.darkmode.enabled` must be enabled)

[bundlemon[bot]]

BundleMon

Files updated (4)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | vendors/settings.(hash).js
| 1MB (+750B +0.07%) | - :white_check_mark: | app/settings.(hash).js
| 93.99KB (+547B +0.57%) | - :white_check_mark: | intents/settings.(hash).js
| 44.76KB (+130B +0.28%) | - :white_check_mark: | app-settings.(hash).min.css
| 9.9KB (+11B +0.11%) | -

Unchanged files (12)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | img/export-cozy-mail.(hash).svg
| 27.39KB | - :white_check_mark: | img/import-cozy.(hash).svg
| 11.09KB | - :white_check_mark: | img/double_authent_prez_banner.(hash).svg
| 4.36KB | - :white_check_mark: | img/protect_data_point.(hash).svg
| 4.1KB | - :white_check_mark: | img/niv_secu_point.(hash).svg
| 1.54KB | - :white_check_mark: | intents-settings.(hash).min.css
| 1.27KB | - :white_check_mark: | img/icon-bills.(hash).svg
| 703B | - :white_check_mark: | img/icon-laptop.(hash).svg
| 439B | - :white_check_mark: | img/icon-arrow-left.(hash).svg
| 414B | - :white_check_mark: | img/icon-question-mark.(hash).svg
| 386B | - :white_check_mark: | img/icon-check.(hash).svg
| 369B | - :white_check_mark: | img/icon-phone.(hash).svg
| 343B | -

Total files change +1.4KB +0.11%

Groups updated (2)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | **/*.js
| 1.14MB (+1.39KB +0.12%) | - :white_check_mark: | **/*.css
| 41.96KB (+11B +0.03%) | -

Unchanged groups (1)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | img/*.*
| 51.07KB | -

Final result: :white_check_mark:

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Current branch size history | Target branch size history