Code examples for CBL P2P pages (iOS)

 A PR to docs-couchbase-lite, against https://github.com/couchbase/docs-couchbase-lite/tree/DOC-10385-Docs-for-Mobile-Scopes-and-Collections to these files:

iOS

modules/objc/examples/code_snippets/SampleCodeTest.m modules/swift/examples/code_snippets/SampleCodeTest.swift 

The following refs need to be updated for Collections:

p2p-tlsid-check-keychain
 p2p-tlsid-check-bundled
 p2p-tlsid-import-from-bundled
 p2p-tlsid-store-in-keychain
 p2p-tlsid-return-id-from-keychain
 p2p-tlsid-delete-id-from-keychain
 p2p-act-rep-func;!autopurge-override
 p2p-act-rep-auth
 p2p-tlsid-tlsidentity-with-label
 listener-initialize
 listener-config-db
 listener-config-port
 listener-config-netw-iface
 listener-get-network-interfaces
 listener-config-delta-sync
 listener-config-tls-enable;listener-config-tls-id-full;!listener-config-tls-id-SelfSigned;!listener-config-tls-id-anon
 listener-config-tls-enable;listener-config-tls-id-full;!listener-config-tls-id-caCert;!listener-config-tls-id-anon
 listener-config-tls-enable;listener-config-tls-id-anon
 listener-config-client-auth-pwd
 listener-config-client-auth-root, indent=0]
 listener-config-client-auth-lambda
 p2p-tlsid-delete-id-from-keychain
 listener-start
 listener-status-check
 listener-stop
 listener-simple
 replicator-simple