Reorganize bepotimist and dotfiles

[sheoak]

See how it is relevant to refactor to bepoptimist.
Two options:

1. Bepoptimist as a main mapping system:

Advantage: you can install bepoptimist without the vim configuration. All the famous plugin work out of the box.

• bepoptimist contain all mapping related to the bépo layout, including the remapping of the leader, the special chars (ðßþ…) and the french quotes.
• the vim configuration contains standard mapping only
• test if plugins are installed, with ability to disable the remappings by blocks
• homerow relocation is optional (done) and mapping use
• important: all mappings related to a group must be in bepoptimist and not divided with vim configuration to avoid partial configuration in case you only use bepoptimist without the dotfiles repository.

2. Bepoptimist does minimal remapping

Advantage: Division of the mappings related to the homerow relocation

• Only take care of homerow and remapping the plugins that need fixing
• The vim configuration take care of the rest

[sheoak]