Add a tools.widgets library which bundles a number of useful, higher
level CBI widgets like firewall zone list or network interface dropdowns
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Introduce a new tools.prng JS library which implements the musl libc
srand() and rand() calls to produce identical pseudo random number
sequences in the browser which is needed for the string to color
conversion later on.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
