Improve UI to plugin installation:

• Remove checkbox and mass action list (post-alpha)

• Add install/uninstall button (pre-alpha)

• Add enable/disable button (doesn't delete all plugin table) (pre-alpha)

• Modify "hook" to not fire events for disabled plugins (new EventListeners) and remove hooks files and tables (pre-alpha)

• Do not parse disabled plugins in regions (active=0) (post-alpha)

• Create new "plugin" table:

• id (internal ID)

• title (of the plugin, in slug form, like directory names in public/plugin/ now)

• installed (0/1 - a bit redundant because only installed plugins should be there, but maybe when a plugin has been uninstalled it would be good to keep them there with a "0" value

• installed_version (string in the semver format: https://semver.org/spec/v2.0.0.html)

• source ('official'/'third_party')

• Create new "access_url_rel_plugin" table

• id (internal ID)

• plugin_id (ref to plugin.id)

• access_url_id (ref to access_url.id)

• active (0/1) for this URL

• configuration (JSON array with settings)

• This will require a migration, as in v1 the plugins are "installed" through a settings_current entry, and sometimes enabled through another entry.

With this DB structure, any update to a new version of Chamilo will require scanning through the plugin table for plugins with installed = 1, and only for these check the difference between the "installed_version" field and the version documented inside the plugin files. If installed_version < text version, then execute the corresponding migrations (if any).