docs: some rewording and clarifying

cli/app/app.go

@@ -7,7 +7,7 @@ import (
 // AppCommand defines the `abra app` command and ets subcommands
 var AppCommand = &cli.Command{
 	Name:      "app",
-	Usage:     "Manage apps",
+	Usage:     "Manage deployed apps",
 	Aliases:   []string{"a"},
 	ArgsUsage: "<app>",
 	Description: `

cli/catalogue/catalogue.go

@@ -7,7 +7,7 @@ import (
 // CatalogueCommand defines the `abra catalogue` command and sub-commands.
 var CatalogueCommand = &cli.Command{
 	Name:        "catalogue",
-	Usage:       "Manage the recipe catalogue",
+	Usage:       "Manage the recipe catalogue (for maintainers)",
 	Aliases:     []string{"c"},
 	ArgsUsage:   "<recipe>",
 	Description: "This command helps recipe packagers interact with the recipe catalogue",

cli/recipe/recipe.go

@@ -31,7 +31,7 @@ var PatchFlag = &cli.BoolFlag{
 // RecipeCommand defines all recipe related sub-commands.
 var RecipeCommand = &cli.Command{
 	Name:      "recipe",
-	Usage:     "Manage recipes",
+	Usage:     "Manage recipes (for maintainers)",
 	ArgsUsage: "<recipe>",
 	Aliases:   []string{"r"},
 	Description: `

cli/server/server.go

@@ -8,7 +8,7 @@ import (
 var ServerCommand = &cli.Command{
 	Name:    "server",
 	Aliases: []string{"s"},
-	Usage:   "Manage servers",
+	Usage:   "Manage servers via 3rd party providers",
 	Description: `
 Manage the lifecycle of a server.