Migrate to chezmoi with per-host sway/waybar configs

- Restructure repo into chezmoi source layout (dot_ prefix)
- Add .chezmoi.toml.tmpl mapping hostname to hosttype (laptop/desktop)
- Template sway config.d fragments (outputs/inputs/binds) per host
- Template waybar config.jsonc with shared bar/module definitions
- Host-scope pulsemeeter (flow) and teams-for-linux (desktop hosts) via .chezmoiignore
- Trim install.sh package lists to configured software + config deps
- Remove stale kitty.conf.bak and untracked host fragments

dot_config/nvim/lua/plugins/blink.lua

@@ -0,0 +1,21 @@
+return {
+  "saghen/blink.cmp",
+  version = "^1",
+  event = "InsertEnter", -- Lazy's native equivalent of the manual InsertEnter augroup
+  config = function()
+    require("blink.cmp").setup({
+      keymap = { preset = "super-tab" },
+      appearance = {
+        nerd_font_variant = "mono",
+        use_nvim_cmp_as_default = true,
+      },
+      completion = {
+        documentation = { auto_show = false },
+      },
+      sources = {
+        default = { "lsp", "path", "snippets", "buffer" },
+      },
+      fuzzy = { implementation = "prefer_rust_with_warning" },
+    })
+  end,
+}