feat: ✨ add after copy message (#129)

# Description

This PR adds an after-copy copier message.

Closes #98 

This PR needs a quick review.

## Checklist

- [x] Formatted Markdown
- [x] Ran `just run-all`

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Luke W. Johnston <lwjohnst86@users.noreply.github.com>

Author: 3 people

copier.yaml

@@ -6,6 +6,38 @@ _tasks:
   - command: "git init -b main && uv add --dev pre-commit commitizen ruff typos && uv add polars seedcase-sprout"
     when: "{{ _copier_operation == 'copy' }}"
 
+# Message to show after generating or regenerating the project successfully
+_message_after_copy: |
+
+  Your project "{{ package_abbrev }}" has been created successfully!
+
+  Next steps:
+
+  1. Change directory to the project root:
+
+    $ cd {{ _copier_conf.dst_path }}
+
+  2. Install the pre-commit hooks:
+
+    $ just install-precommit
+
+  3. Install [`spaid`](https://github.com/seedcase-project/spaid) and run these setup steps:
+
+    $ spaid_gh_create_repo_from_local -h
+    $ spaid_gh_set_repo_settings -h
+    $ spaid_gh_ruleset_basic_protect_main -h
+
+  4. Configure GitHub following this
+    [guide](https://guidebook.seedcase-project.org/operations/security#using-github-apps-to-generate-tokens):
+
+    - Install the [auto-release-token](https://github.com/apps/auto-release-token) GitHub App
+    - Create an `UPDATE_VERSION_TOKEN` secret
+    - Create an `UPDATE_VERSION_APP_ID` variable
+
+  5. List and complete all TODO items in the repository:
+
+    $ just list-todos
+
 # Questions:
 package_github_repo:
   type: str