Yafpa

Fix
* A bunch of firewall in case of error ([`bce743b`](https://github.com/Mara-Li/YAFPA/commit/bce743b3a0d4db008f9884fa054db1f7d7c7ea4a))

Fix
* Wrong fix ; real fix now ([`70dbad2`](https://github.com/Mara-Li/YAFPA/commit/70dbad28a262da7b1e71b3c0b73f46257bd6be82))

Fix
* Fix metadata if 'category' don't exist ([`9a940e0`](https://github.com/Mara-Li/YAFPA/commit/9a940e0df64980d80e4342cba126874a66504da6))

Feature
* **metadata:** Change folder working and add a config option for the share key ([`0a3ce81`](https://github.com/Mara-Li/YAFPA/commit/0a3ce81a3d1db6db4eb1d312a528a51947d4ae7c))

Fix
* **metadata:** Prevent breaking index ([`7f71484`](https://github.com/Mara-Li/YAFPA/commit/7f7148428a9ecf779fb35e939b34771356c43f4e))

Breaking
* - the 'share' metadata key can be changed in the environnement settings. - The 'folder' key is now optional : you can configure folder with the 'category' key using "category: Folder/category" ; to configure folder without category : "folder/false" will work. ([`0a3ce81`](https://github.com/Mara-Li/YAFPA/commit/0a3ce81a3d1db6db4eb1d312a528a51947d4ae7c))

Documentation
* **readme:** Update docs for the new metadata option ([`a24fab9`](https://github.com/Mara-Li/YAFPA/commit/a24fab958f5063f9a6ca2ab81e58c1adbc1e41ab))
* **readme:** Update docs for the new metadata option ([`01eb78e`](https://github.com/Mara-Li/YAFPA/commit/01eb78e24300503d19a788788c6e868192c7349b))
* **readme:** Update docs for metadata ([`b70a0a3`](https://github.com/Mara-Li/YAFPA/commit/b70a0a30f75460fd76152556fc18e56647d01539))

Fix
* Fix Heading IAL and add IAL line return ([`feb8e20`](https://github.com/Mara-Li/YAFPA/commit/feb8e20d949b0504698b5e9fdf6a7e14fee841b3))

Feature
* :sparkles: mermaid support ([`458ae37`](https://github.com/Mara-Li/YAFPA-python/commit/458ae37550dd039f71392e9494969476f89e9498))