feat: Add shell completions for Nushell and Elvish (#337)

* feat(stackablectl): nushell completions

* feat(stackablectl): elvish completions

* chore(xtask): Add gen-all command

* chore(stackablectl): update changelog

* Apply suggestions from code review

Co-authored-by: Techassi <git@techassi.dev>

---------

Co-authored-by: Techassi <git@techassi.dev>

Author: NickLarsenNZ

.pre-commit-config.yaml

@@ -40,6 +40,7 @@ repos:
     hooks:
       - id: shellcheck
         args: ["--severity=info"]
+        exclude: '^extra/completions/'
 
   - repo: https://github.com/rhysd/actionlint
     rev: 62dc61a45fc95efe8c800af7a557ab0b9165d63b # 1.7.1

Cargo.lock

@@ -23,6 +23,7 @@ bindgen = "0.70.1"
 cc = "1.0.83"
 clap = { version = "4.5", features = ["derive", "env"] }
 clap_complete = "4.5"
+clap_complete_nushell = "4.5"
 comfy-table = { version = "7.1", features = ["custom_styling"] }
 directories = "5.0"
 dotenvy = "0.15"

Cargo.nix

@@ -6,10 +6,12 @@ Generate shell completions for this tool
 Usage: stackablectl completions [OPTIONS] <COMMAND>
 
 Commands:
-  bash  Generate shell completions for Bash
-  fish  Generate shell completions for Fish
-  zsh   Generate shell completions for ZSH
-  help  Print this message or the help of the given subcommand(s)
+  bash     Generate shell completions for Bash
+  elvish   Generate shell completions for Elvish
+  fish     Generate shell completions for Fish
+  nushell  Generate shell completions for Nushell
+  zsh      Generate shell completions for ZSH
+  help     Print this message or the help of the given subcommand(s)
 
 Options:
   -l, --log-level <LOG_LEVEL>