Switch to Cobra

Also:
- Fixed the Makefile
- Added a Taskfile.yml (see: https://taskfile.dev)
- Updated the manual page

Signed-off-by: Shin'ya Minazuki <shinyoukai@laidback.moe>

mikuru.1

@@ -3,15 +3,28 @@
 .Os
 .Sh NAME
 .Nm mikuru
-.Nd A yarn-compatible twtxt client from the future
+.Nd A yarn.social client from the future
 .Sh SYNOPSIS
 .Nm
+.Op Cm login
+.Op Cm post
 .Sh DESCRIPTION
-This client has every single part of its functionality
-handled by a separate program.
-.Sh SEE ALSO
-.Xr mikuru-login 1
-.Xr mikuru-post 1
-.Xr mikuru-timeline 1
+This program was made by reverse engineering the reference client
+due to lack of known API documentation for the client library it uses.
+.Pp
+It doesn't share any code with it, however.
+.Sh USAGE
+.Bl -tag -width 11n
+.It login
+Authenticate with a Yarn.social pod,
+it will ask you for your credentials
+(passwords are not echoed)
+.It post
+Publish a tweet to a Yarn.social pod,
+it will open your text editor (usually $EDITOR),
+and will fail if the variable is unset.
+.El
+.Sh FILES
+.Pa ~/.config/mikuru.ini
 .Sh AUTHORS
 .An Shin'ya Minazuki Aq Mt shinyoukai@laidback.moe