Reapply "docs: Document imports dir. Remove What's next sections everywhere. Merge guide overview and hompage view."

This reverts commit ba517f56b3.

docs/site/manual/repo-layout.md

@@ -1,4 +1,3 @@
-# Repo Layout Guide
 
 This guide will help you navigate the codebase and locate key files:
 
@@ -24,37 +23,3 @@ $ tree -L 1
 
 To dive into infrastructure, check out our clan infra repo: [clan-infra](https://git.clan.lol/clan/clan-infra). Please provide us with your public SOPS key so we can add you as an admin.
 
-## Related Projects
-
-- **Data Mesher**: [dm](https://git.clan.lol/clan/dm)
-- **Nixos Facter**: [nixos-facter](https://github.com/nix-community/nixos-facter)
-- **Nixos Anywhere**: [nixos-anywhere](https://github.com/nix-community/nixos-anywhere)
-- **Disko**: [disko](https://github.com/nix-community/disko)
-
-## Fixing Bugs or Adding Features in Clan-CLI
-
-If you have a bug fix or feature that involves a related project, clone the relevant repository and replace its invocation in your local setup.
-
-For instance, if you need to update `nixos-anywhere` in clan-cli, find its usage:
-
-```python
-run(
-    nix_shell(
-        ["nixpkgs#nixos-anywhere"],
-        cmd,
-    ),
-    RunOpts(log=Log.BOTH, prefix=machine.name, needs_user_terminal=True),
-)
-```
-
-You can replace `"nixpkgs#nixos-anywhere"` with your local path:
-
-```python
-run(
-    nix_shell(
-        ["<path_to_local_src>#nixos-anywhere"],
-        cmd,
-    ),
-    RunOpts(log=Log.BOTH, prefix=machine.name, needs_user_terminal=True),
-)
-```