feat(pia): add PIA login-and-add WireGuard outbounds (#6272)

* feat(pia): add login-and-add WireGuard outbounds (#2)

* fix(pia): keep PIA outbounds identifiable after the editor strips hostname

The outbound editor drops piaHostname, so last-segment matching failed for hyphenated servers. Identify rows by the computed tag, re-encrypt stored tokens onto the active key, skip unusable catalog rows, and always release the catalog refresh latch.

internal/pia/trust/ca.rsa.4096.crt

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internal/pia/trust/serverlist_public_key.pem

@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
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+-----END PUBLIC KEY-----