chore: dont assume a file extension when running no-cmd tasks (#74)

examples/tasks.toml

@@ -21,7 +21,7 @@ cmds = [
   "echo \"my pwd is $(pwd)\"", # you can use subshells
 ]
 
-# when `cmds` are omitted tsk attempts to run a script located at `scripts/<task_name>.sh`
+# when `cmds` are omitted tsk attempts to run a script located at `tsk/<task_name>`
 [tasks.no_cmd]
 env = {
   GREETING = "Hello",

internal/task/task.go

@@ -200,7 +200,7 @@ func (exec *Executor) ListTasksFromTaskFile(regex *regexp.Regexp) {
 				fmt.Printf("%s\n", indent+indent+cmd)
 			}
 		} else {
-			fmt.Printf("%s# will run `%s/%s.sh`\n", indent, exec.Config.ScriptDir, name)
+			fmt.Printf("%s# will run `%s/%s`\n", indent, exec.Config.ScriptDir, name)
 		}
 
 		// dir

tasks.toml

@@ -45,6 +45,11 @@ cmds = ["go mod tidy"]
 
 [tasks.install_release]
 # see scripts/install_release.sh for configurable env arguments
+description = '''
+Downloads the specified release and installs it to ~/bin.
+
+usage: version=0.8.1 platform=Darwin arch=arm64 tsk install_release
+'''
 
 [tasks.sign]
 dotenv = ".env"