Export & import storage archive (#726)

* core: import and export of chat archive

* export chat archive

* import archive, support starting chat after it is stopped

* test for maintenance mode

* test/fix archive with files

* prevent starting chat after chat database was deleted or imported

* update simplexmq

stack.yaml

@@ -49,7 +49,7 @@ extra-deps:
   # - simplexmq-1.0.0@sha256:34b2004728ae396e3ae449cd090ba7410781e2b3cefc59259915f4ca5daa9ea8,8561
   # - ../simplexmq
   - github: simplex-chat/simplexmq
-    commit: 964daf5442e1069634762450bc28cfd69a2968a1
+    commit: 628930df1fa1c3fff6fd1413e7b437148c4a83b5
   # - terminal-0.2.0.0@sha256:de6770ecaae3197c66ac1f0db5a80cf5a5b1d3b64a66a05b50f442de5ad39570,2977
   - github: simplex-chat/aeson
     commit: 3eb66f9a68f103b5f1489382aad89f5712a64db7
@@ -59,8 +59,10 @@ extra-deps:
 # extra-deps: []
 
 # Override default flag values for local packages and extra-deps
-# flags: {}
-
+flags:
+  zip:
+    disable-bzip2: true
+    disable-zstd: true
 # Extra package databases containing global packages
 # extra-package-dbs: []