Add commands for remote session credentials (#3161)

* Add remote host commands

* Make startRemoteHost async

* Add tests

* Trim randomStorePath to 16 chars

* Add chat command tests

* add view, use view output in test

* enable all tests

* Fix discovery listener host

Must use any, not broadcast on macos.

* Fix missing do

* address, names

* Fix session host flow

* fix test

---------

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

src/Simplex/Chat/Migrations/chat_schema.sql

@@ -518,17 +518,19 @@ CREATE TABLE IF NOT EXISTS "received_probes"(
 );
 CREATE TABLE remote_hosts(
   -- hosts known to a controlling app
-  remote_host_id INTEGER PRIMARY KEY,
-  display_name TEXT NOT NULL,
-  store_path TEXT NOT NULL,
-  ca_cert BLOB NOT NULL,
-  ca_key BLOB NOT NULL
+  remote_host_id INTEGER PRIMARY KEY AUTOINCREMENT,
+  store_path TEXT NOT NULL, -- file path relative to app store(must not contain "/")
+  display_name TEXT NOT NULL, -- user-provided name for a remote host
+  ca_key BLOB NOT NULL, -- private key for signing session certificates
+  ca_cert BLOB NOT NULL, -- root certificate, whose fingerprint is pinned on a remote
+  contacted INTEGER NOT NULL DEFAULT 0 -- 0(first time), 1(connected before)
 );
 CREATE TABLE remote_controllers(
   -- controllers known to a hosting app
-  remote_controller_id INTEGER PRIMARY KEY,
-  display_name TEXT NOT NULL,
-  fingerprint BLOB NOT NULL
+  remote_controller_id INTEGER PRIMARY KEY AUTOINCREMENT,
+  display_name TEXT NOT NULL, -- user-provided name for a remote controller
+  fingerprint BLOB NOT NULL, -- remote controller CA fingerprint
+  accepted INTEGER -- NULL(unknown), 0(rejected), 1(confirmed)
 );
 CREATE INDEX contact_profiles_index ON contact_profiles(
   display_name,