Extract bos-settings to its own repo; add breadhelp; JSON-driven Hyprland config

bos-settings moves to git.breadway.dev/Breadway/bos-settings (full history
preserved via git-filter-repo) so its release cadence is decoupled from
BOS's own. breadhelp takes its place as this repo's workspace member: a
GTK4 onboarding/help center replacing the old bos-welcome/bos-keybinds
bash scripts with searchable guides, an interactive keybind viewer
(sourced from the new keybinds.toml, not parsed out of hyprland.lua or
hardcoded), a troubleshooting wizard with one-click fixes, and a proper
first-run tour. bos-netcheck extracts bos-welcome's network-check half,
which still needs to run every login independent of breadhelp's own
first-run gating.

hyprland.lua's keybinds/settings/monitors/autostart are now JSON-driven
(binds.json/settings.json/monitors.json/autostart.json) with every
loader pcall-wrapped and falling back to hardcoded defaults per field on
bad or missing config, so bread* apps (bos-settings' new editors, and
breadhelp's keybind viewer) can read/write this config without ever
being able to leave the compositor unable to start.

CI's package.yml now builds breadhelp instead of bos-settings on tag
push; bos-settings needs its own equivalent workflow in its new repo
(not yet set up).

iso/airootfs/etc/skel/.config/hypr/scripts/input/binds.lua

@@ -0,0 +1,35 @@
+-- scripts/input/binds.lua — loads binds.json into { default_mods, bindings }.
+-- Simpler than the multi-keyboard-layout version some personal configs use
+-- (BOS ships one fixed layout, no per-layout bind switching needed): just
+-- reads `default_mods` + the flat `bindings` array.
+
+local json = dofile(os.getenv("HOME") .. "/.config/hypr/scripts/lib/json.lua")
+
+local function normalize_mods(value, fallback)
+    local mods = {}
+    if type(value) == "table" then
+        for _, item in ipairs(value) do
+            if type(item) == "string" and item ~= "" then
+                mods[#mods + 1] = item
+            end
+        end
+    end
+    if #mods == 0 then
+        for _, mod in ipairs(fallback or {}) do
+            mods[#mods + 1] = mod
+        end
+    end
+    return mods
+end
+
+return function(configPath)
+    local parsed = json.load(configPath)
+    if type(parsed) ~= "table" then
+        return { default_mods = { "SUPER" }, bindings = {} }
+    end
+
+    return {
+        default_mods = normalize_mods(parsed.default_mods, { "SUPER" }),
+        bindings = type(parsed.bindings) == "table" and parsed.bindings or {},
+    }
+end