Trim over-commented Chunk 3+/4 work

A pass over the install scripts, dev-tools commands, and Hyprland Lua
files that I had stuffed with explain-everything preambles. Most of
those rationales (which files ship where, why hyprctl setenv doesn't
suffice, etc.) belong in commit messages or PR descriptions, not in
code people have to read forever. Kept the few comments that document
genuinely non-obvious behaviour: the keybind-env reason for hl.env in
envs.lua, why the runtime PAM seds stay scripted in
increase-lockout-limit, the chroot/--now distinction in chroot.sh, and
the dev-pkg-test split-install reason.

default/hypr/paths.lua

@@ -4,18 +4,14 @@
 
 local home = os.getenv("HOME")
 
--- Resolve OMARCHY_PATH with omarchy-dev-link awareness. If /etc/omarchy.conf
--- exists it wins over the process env, so dev-link takes effect even when
--- Hyprland's own env is stale (the launching session never re-read the conf).
+-- /etc/omarchy.conf wins over process env so dev-link survives stale sessions.
 local function read_dev_link_omarchy_path()
   local f = io.open("/etc/omarchy.conf", "r")
   if not f then return nil end
   local value
   for line in f:lines() do
     local v = line:match('^%s*export%s+OMARCHY_PATH=%s*"?([^"\n]+)"?')
-    if v and #v > 0 then
-      value = v
-    end
+    if v and #v > 0 then value = v end
   end
   f:close()
   return value