* add cidr subnet support
allows checking entire subnets using cidr notation (e.g. 1.1.1.0/24, 2001:db8::/32)
- parse ipv4/ipv6 subnets from input with / delimiter
- sample 256 addresses from large subnets for checking
- show actual subnet size in ui (e.g. "8.2K всего, показано 256")
- update search placeholder with cidr examples
- limit min prefix to /8 for ipv4 and /32 for ipv6 to prevent abuse
* chore: bump version
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Co-authored-by: Lowder <me@lowderplay.dev>
