feat(protonvpn): feature filters (#2182)

- `SECURE_CORE_ONLY`
- `TOR_ONLY`
- `P2P_ONLY`

internal/provider/protonvpn/updater/iptoserver.go

@@ -9,8 +9,15 @@ import (
 
 type ipToServer map[string]models.Server
 
+type features struct {
+	secureCore bool
+	tor        bool
+	p2p        bool
+	stream     bool
+}
+
 func (its ipToServer) add(country, region, city, name, hostname string,
-	free bool, entryIP netip.Addr) {
+	free bool, entryIP netip.Addr, features features) {
 	key := entryIP.String()
 
 	server, ok := its[key]
@@ -25,6 +32,10 @@ func (its ipToServer) add(country, region, city, name, hostname string,
 	server.ServerName = name
 	server.Hostname = hostname
 	server.Free = free
+	server.SecureCore = features.secureCore
+	server.Tor = features.tor
+	server.P2P = features.p2p
+	server.Stream = features.stream
 	server.UDP = true
 	server.TCP = true
 	server.IPs = []netip.Addr{entryIP}