Change move handler to carry blocks over (#14144)

* Change move handler to carry blocks and mutes over

When user A blocks user B and B moves to a new account C, make A block C
accordingly.

Note that it only works if A's instance is aware of the Move, that is,
if B is on A's instance or has followers there.

* Also notify instances with known people blocking you when moving

* Add automatic account notes when blocking/muting an account that had no note

config/i18n-tasks.yml

@@ -60,6 +60,7 @@ ignore_unused:
   - 'admin.accounts.roles.*'
   - 'admin.action_logs.actions.*'
   - 'statuses.attached.*'
+  - 'move_handler.carry_{mutes,blocks}_over_text'
 
 ignore_inconsistent_interpolations:
   - '*.one'

config/locales/en.yml

@@ -941,6 +941,8 @@ en:
   moderation:
     title: Moderation
   move_handler:
+    carry_blocks_over_text: This user moved from %{acct}, which you had blocked.
+    carry_mutes_over_text: This user moved from %{acct}, which you had muted.
     copy_account_note_text: 'This user moved from %{acct}, here were your previous notes about them:'
   notification_mailer:
     digest: