Minor reorganization of borgmatic source code reference.

docs/_includes/index.css

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docs/reference/source-code.md

@@ -10,20 +10,17 @@ eleventyNavigation:
 If case you're interested in [developing on
 borgmatic](https://torsion.org/borgmatic/docs/how-to/develop-on-borgmatic/),
 here's an abridged primer on how its Python source code is organized to help
-you get started. At the top level we have:
+you get started. Starting at the top level, we have:
 
- * [borgmatic](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic): The main borgmatic source module. Most of the code is here.
+ * [borgmatic](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic): The main borgmatic source module. Most of the code is here. Within that:
+   * [actions](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/actions): borgmatic-specific logic for running each action (create, list, check, etc.).
+   * [borg](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/borg): Lower-level code that's responsible for interacting with Borg to run each action.
+   * [commands](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/commands): Looking to add a new flag or action? Start here. This contains borgmatic's entry point, argument parsing, and shell completion. 
+   * [config](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/config): Code responsible for loading, normalizing, and validating borgmatic's configuration.
+   * [hooks](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/hooks): Looking to add a new database or monitoring integration? Start here.
  * [docs](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/docs): How-to and reference documentation, including the document you're reading now.
  * [sample](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/sample): Example configurations for cron and systemd.
  * [scripts](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/scripts): Dev-facing scripts for things like building documentation and running end-to-end tests.
  * [tests](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/tests): Automated tests organized by: end-to-end, integration, and unit.
 
-Within the `borgmatic` directory you'll find:
-
- * [actions](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/actions): Mid-level code for running each borgmatic action (create, list, check, etc.).
- * [borg](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/borg): Lower-level code that actually shells out to Borg for each action.
- * [commands](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/commands): Looking to add a new flag or action? Start here. This contains borgmatic's entry point, argument parsing, and shell completion. 
- * [config](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/config): Code responsible for loading, normalizing, and validating borgmatic's configuration.
- * [hooks](https://projects.torsion.org/borgmatic-collective/borgmatic/src/branch/main/borgmatic/hooks): Looking to add a new database or monitoring integration? Start here.
-
 So, broadly speaking, the control flow goes: `commands` → `config` followed by `commands` → `actions` → `borg` and `hooks`.