refactor: standardize file-level comments, drop unused pkgs, and theme lazygit with base16

- Move inline comments to top of file across all modules for consistent
style
- Add descriptive comments to files missing them (aggregators,
assertions, scripts, flake)
- Remove unused `pkgs` parameter from i3/keybindings.nix and
zathura/default.nix
- Drop explicit `package = pkgs.zathura` (home-manager provides the
default)
- Delete stale meli-sync.sh (migrated to neomutt)
- Remove extraneous blank lines for consistent formatting
- Theme lazygit with config.scheme base16 colors instead of hardcoded
names

2 files changed, 2 insertions, 2 deletions

diff --git a/modules/development/git/assertions.nix b/modules/development/git/assertions.nix
index df85c62..d663173 100644
--- a/modules/development/git/assertions.nix
+++ b/modules/development/git/assertions.nix
@@ -1,3 +1,4 @@
+# Assertions - Validates SSH is enabled when git.useSSH is set
 { config, ... }:
 {
   assertions = [
diff --git a/modules/development/git/default.nix b/modules/development/git/default.nix
index 5d2d89c..587e4bf 100644
--- a/modules/development/git/default.nix
+++ b/modules/development/git/default.nix
@@ -1,11 +1,10 @@
+# Git - Distributed version control system
 {
   config,
   lib,
   pkgs,
   ...
 }:
-
-# Git - Distributed version control system
 {
   imports = [
     ./assertions.nix