📝 Add packs.md (#2152)

Adding a page per `packs` documentation on
https://github.com/rubyatscale/packs

`packs` is a system to modualize ruby projects.

---------

Co-authored-by: Rico Sta. Cruz <rstacruz@users.noreply.github.com>

packs.md

@@ -0,0 +1,118 @@
+---
+title: Packs (ruby)
+category: Ruby libraries
+updated: 2024-07-05
+intro: Packs are a specification for an extensible packaging system to help modularize Ruby applications.
+---
+
+## Manage packs
+
+### Create pack
+
+```bash
+$ bin/packs create packs/pack_name
+```
+
+#### Example
+
+```bash
+$ bin/packs create packs/profiles
+```
+
+Create new pack named `profiles`.
+
+### Make a file or directory public
+
+```bash
+$ bin/packs make_public path/to/file.rb
+$ bin/packs make_public path/to/directory
+```
+
+Make file or directory public API, meaning that classes outside the package can call this logic.
+
+#### Example
+
+```bash
+$ bin/packs make_public packs/profiles/app/services/create_profile_service.rb
+```
+
+Allow external code to call the class `CreateProfileService`.
+
+This command will mainly move that file in `packs/profiles/app/public/create_profile_service.rb`
+
+### Move a pack
+
+```bash
+$ bin/packs move packs/destination_pack path/to/file.rb
+$ bin/packs move packs/destination_pack path/to/directory
+```
+
+Move file or directory from one pack to another pack.
+
+```bash
+$ bin/packs move_to_folder packs/foo path/to/directory
+```
+
+Move `packs/foo` to the `path/to/directory` folder, where `path/to/directory` does not contain a `package.yml` file.
+
+```bash
+$ bin/packs move_to_parent packs/child_pack packs/parent_pack
+```
+
+Set `packs/child_pack` as a child of `packs/parent_pack`.
+
+### Add dependency to a pack
+
+```bash
+$ bin/packs add_dependency packs/from_pack packs/to_pack
+```
+
+## Packs validity
+
+### All packs are valid?
+
+```bash
+$ bin/packs validate
+```
+
+Runs `bin/packwerk validate` under the hood (detects cycles).
+
+### A specific pack is valid?
+
+```bash
+$ bin/packs check packs/pack_name
+```
+
+Runs `bin/packwerk check` under the hood.
+
+### Update `package.yml`
+
+```bash
+$ bin/packs update
+```
+
+Runs `bin/packwerk update-todo` under the hood.
+
+## Lints
+
+```bash
+$ bin/packs lint_package_todo_yml_files
+```
+
+Lint `package_todo.yml` files to check for formatting issues.
+
+```bash
+$ bin/packs lint_package_yml_files [ packs/my_pack packs/my_other_pack ]
+```
+
+Lint `package.yml` files.
+
+```bash
+$ bin/packs list_top_violations type [ packs/your_pack ]
+```
+
+List the top violations of a specific type for `packs/your_pack`.
+
+## Also see
+
+- [Documentation](https://github.com/rubyatscale/packs) _(`packs` github repository)_