changed default view to a cleaner solution for smaller screens.

[awtGerry]

Things done on core

• the register of subjects now returns a string with the message of succes or fail.
• fix type for subjects

Things done in interface

• I changed default view of the Registro.svelte and changed that name to Vista.svelte because it was messing with my head.
• I added TableComponent that basically automate the process of adding backend info to frontend tables.
• I added styles/ to save repetitives styles on svelte files.

[awtGerry]

New view:

[awtGerry]

this starts the #17