Basic D-Bus API (#866)

* feat: basic D-Bus API

Expose muted state and the number of unread message over D-Bus when
running on Linux. This is useful for, e.g., displaying notifications on
a window manager status bar.

Signed-off-by: Kristóf Marussy <kristof@marussy.com>

* docs: create docs directory

Move the documentation to a separate directory so that new documentation
can be added into one place.

We keep the following files still in the repository root by convention:

* CHANGELOG.md
* CODE_OF_CONDUCT.md
* CONTRIBUTING.md
* LICENSE.md
* README.md
* SECURITY.md

Signed-off-by: Kristóf Marussy <kristof@marussy.com>

* docs: D-Bus usage example

Signed-off-by: Kristóf Marussy <kristof@marussy.com>

* fix: remove unneeded D-Bus signals

Only notify clients that the message counts or the mute status has
changed if there actually was a change.

Signed-off-by: Kristóf Marussy <kristof@marussy.com>

* docs: rewrite sample bar client

* docs: better unread --services help

* docs: update dbus docs

* docs: use ferdium-dbus in dbus bar example

* docs: make command argument required in bar example

---------

Signed-off-by: Kristóf Marussy <kristof@marussy.com>
Co-authored-by: Victor Bonnelle <victor.bonnelle@protonmail.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/scripts/migration/migrate-unix.sh b/scripts/migration/migrate-unix.sh
index 37f24a533..c51227f33 100755
--- a/scripts/migration/migrate-unix.sh
+++ b/scripts/migration/migrate-unix.sh
@@ -65,6 +65,6 @@ else
   echo "WARNING: Your data was partially migrated!"
   echo "It was detected that your account is using Ferdi servers to sync your data."
   echo "Please, check this guide on how to export and import your data manually:"
-  echo "https://github.com/ferdium/ferdi/blob/main/MIGRATION.md"
+  echo "https://github.com/ferdium/ferdi/blob/main/docs/MIGRATION.md"
   echo "********************************************"
 fi
diff --git a/scripts/migration/migrate-windows.ps1 b/scripts/migration/migrate-windows.ps1
index a7e67b94a..0a793077c 100644
--- a/scripts/migration/migrate-windows.ps1
+++ b/scripts/migration/migrate-windows.ps1
@@ -39,7 +39,7 @@ if (-not (Test-Path -Path $FERDIUM_PATH/server.sqlite)) {
     Write-Host ""
     Write-Host "It was detected that your account is using Ferdi servers to sync your data."
     Write-Host "Please, check this guide on how to export and import your data manually:"
-    Write-Host "https://github.com/ferdium/ferdi/blob/main/MIGRATION.md"
+    Write-Host "https://github.com/ferdium/ferdi/blob/main/docs/MIGRATION.md"
     Write-Host ""
     Write-Host "********************************************"