Fix packaging and Use parameterized names for zsh completion

assets/completions/bat.zsh.in

@@ -1,4 +1,4 @@
-#compdef bat
+#compdef {{PROJECT_EXECUTABLE}}
 
 local context state state_descr line
 typeset -A opt_args
@@ -19,8 +19,8 @@ _cache_subcommand() {
     _arguments -S -s $args
 }
 
-(( $+functions[_bat_main] )) ||
-_bat_main() {
+(( $+functions[_main] )) ||
+_main() {
     local -a args
     args=(
         '(-A --show-all)'{-A,--show-all}'[Show non-printable characters (space, tab, newline, ..)]'
@@ -55,7 +55,7 @@ _bat_main() {
         language)
             local IFS=$'\n'
             local -a languages
-            languages=( $(bat --list-languages | awk -F':|,' '{ for (i = 1; i <= NF; ++i) printf("%s:%s\n", $i, $1) }') )
+            languages=( $({{PROJECT_EXECUTABLE}} --list-languages | awk -F':|,' '{ for (i = 1; i <= NF; ++i) printf("%s:%s\n", $i, $1) }') )
 
             _describe 'language' languages 
         ;;
@@ -63,7 +63,7 @@ _bat_main() {
         theme)
             local IFS=$'\n'
             local -a themes
-            themes=( $(bat --list-themes | sort) )
+            themes=( $({{PROJECT_EXECUTABLE}} --list-themes | sort) )
 
             _values 'theme' $themes
         ;;
@@ -79,7 +79,7 @@ if (( ${#words} == 2 )); then
     local -a subcommands
     subcommands=('cache:Modify the syntax-definition and theme cache')
     _describe subcommand subcommands
-    _bat_main
+    _main
 else
     case $words[2] in
         cache)
@@ -87,7 +87,7 @@ else
         ;;
 
         *)
-            _bat_main
+            _main
         ;;
     esac
 fi