Map capability names to their bit indices

Map bit indices back to capability names

Map bit indices back to capability names (with customizable default

Check if a capability bit is set in hex value.

Hex value is a string like "0000003fffffffff" (read right to left, LSB first)

%% Example usage:

is_capability_set("0000003fffffffff", kill) -> true
is_capability_set("0000003fffffffff", sys_admin) -> false

Validate capability names and convert to proper format (cap_ prefix).

%% Example usage:

validate_capabilities([cap_kill, cap_sys_admin]) -> [kill, sys_admin]
validate_capabilities([kill, sys_admin]) -> [kill, sys_admin]
validate_capabilities([invalid]) -> error({invalid_capability, invalid})