docs: sync French README content with English (#8831)

* docs: add missing app rows to French README

Sync mobile and desktop tables with English README:
add FeedFlow and FluentFlame Reader, previously missing from
the French translation.

* fix(docs): correct Fluent Reader API in French README

Align with English README: Fluent Reader supports the Google Reader
API (preferred), not Fever. The app upstream documents both, and the
English table has long listed GReader.

---------

Co-authored-by: Bjørn A. Andersen <polybjorn@users.noreply.github.com>

README.fr.md

@@ -272,13 +272,15 @@ et [l’API Fever](https://freshrss.github.io/FreshRSS/fr/users/06_Fever_API.htm
 | [Read You](https://github.com/Ashinch/ReadYou/)                                       | Android     | [✓](https://github.com/Ashinch/ReadYou/)                     | ✓✓                   | GReader          | ✓            | ⭐⭐      | ✓                             | ✓                  | ✓         | –     | –      | ✓           |
 | [Your News](https://yournews.app/)                                                    | Android, iOS| –                                                            | ✓✓                   | GReader          | –            | ⭐       | ✓                             | ✓                  | ✓        | –     | –      | –        |
 | [Fluent Reader Lite](https://hyliu.me/fluent-reader-lite/)                            | Android, iOS| [✓](https://github.com/yang991178/fluent-reader-lite)        | ✓                     | GReader          | ✓            | ⭐⭐      | –                             | –                  | ✓         | –     | –       | –           |
+| [FeedFlow](https://www.feedflow.dev)                                                  | Android, iOS, Linux, macOS, Windows | [✓](https://github.com/prof18/feed-flow)                     | ✓✓                   | GReader          | ✓            | ?        | ?                             | ?                  | ✓         | ?     | –       | ✓           |
 
 | App                                                                                   | Plateforme  | Logiciel libre                                                | Maintenu & Dévelopé    | API              | Mode hors-ligne | Sync rapide | Récupère plus d’articles dans les vues individuelles | Récupère les articles lus | Favoris  | Étiquettes | Podcasts | Gestion des flux |
 |:--------------------------------------------------------------------------------------|:-----------:|:-------------------------------------------------------------:|:----------------------:|:----------------:|:-------------:|:---------:|:------------------------------:|:-------------------:|:----------:|:------:|:--------:|:------------:|
-| [Fluent Reader](https://hyliu.me/fluent-reader/)                             | Windows, Linux, macOS| [✓](https://github.com/yang991178/fluent-reader)             | ✓✓                   | Fever            | ✓            | ⭐         | –                             | ✓                  | ✓         | –     | –       | –           |
+| [Fluent Reader](https://hyliu.me/fluent-reader/)                             | Windows, Linux, macOS| [✓](https://github.com/yang991178/fluent-reader)             | ✓✓                   | GReader          | ✓            | ⭐         | –                             | ✓                  | ✓         | –     | –       | –           |
 | [RSS Guard](https://github.com/martinrotter/rssguard)             | Windows, GNU/Linux, macOS, OS/2 | [✓](https://github.com/martinrotter/rssguard)                | ✓✓                   | GReader          | ✓            | ⭐⭐ | – | ✓ | ✓ | ✓ | ✓ | ✓ |
 | [NewsFlash](https://gitlab.com/news-flash/news_flash_gtk)                             | GNU/Linux   | [✓](https://gitlab.com/news-flash/news_flash_gtk)            | ✓✓                   | GReader          | –            | ⭐⭐        | –                           | ✓                | ✓       | ✓    | –      | –          |
 | [Newsboat](https://newsboat.org/)                                       | GNU/Linux, macOS, FreeBSD | [✓](https://github.com/newsboat/newsboat/)                   | ✓✓                   | GReader          | –            | ⭐        | –                             | ✓                  | ✓         | –     | ✓       | –           |
+| [FluentFlame Reader](https://github.com/FluentFlame/fluentflame-reader)      | Windows, Linux, macOS| [✓](https://github.com/FluentFlame/fluentflame-reader)       | En développement       | GReader          | ✓            | ?        | ?                             | ?                  | ✓         | –     | –       | –           |
 
 | App                                                                                   | Plateforme  | Logiciel libre                                                | Maintenu & Dévelopé    | API              | Mode hors-ligne | Sync rapide | Récupère plus d’articles dans les vues individuelles | Récupère les articles lus | Favoris  | Étiquettes | Podcasts | Gestion des flux |
 |:--------------------------------------------------------------------------------------|:-----------:|:-------------------------------------------------------------:|:----------------------:|:----------------:|:-------------:|:---------:|:------------------------------:|:-------------------:|:----------:|:------:|:--------:|:------------:|