GSLUX-734: My symbols

[AlitaBernachot]

JIRA issue

https://jira.camptocamp.com/browse/GSLUX-734

Description

Display private symbols when user is connected. Allow user to upload new private symbols.

To make it work, you must:

• deactivate all CORS plugin
• run backend on localhost:8080 and allow all requests from vite host
• update db (symbol table and add symbols, see db repo: https://github.com/camptocamp/luxembourg_dev_db/tree/add_symbols)

[github-actions]

GitHub Pages links: * Luxembourg-geoportail: https://geoportail-luxembourg.github.io/luxembourg-geoportail/GSLUX-734-my-symbols/

[mki-c2c]

Thanks, seems like a big piece of work with a lot of refactoring.

Tested it thoroughly with local API.
reload of private icon list works well after upload.

For the DB update, the part concernig mymaps structure should go into an alembic migration script in geoportail_v3, the sample data is fine in luxembourg_dev_db.

Thanks for the refactoring of multiple symbols into a templated component.
Maybe we can do the same with private and public symbols.