chore: update flake.lock and justfile, add foldlevel setting in vim.lua

- Updated `flake.lock` with new `nixpkgs` revision and hash.
- Modified `justfile`:
  - Renamed `build` to `package` and added `__default` target to list available recipes.
- Added `foldlevel` setting to `set_vim_wo` function in `vim.lua` to set fold level to 99.

justfile

@@ -1,8 +1,11 @@
-build profile="default":
-    nix build --json --no-link --print-build-logs ".#{{ profile }}"
+__default:
+    just --list
 
 check:
     nix flake check
 
+package profile="default":
+    nix build --json --no-link --print-build-logs ".#{{ profile }}"
+
 update:
     nix flake update

lua/TheAltF4Stream/vim.lua

@@ -24,6 +24,7 @@ end
 local function set_vim_wo()
     local settings = {
         foldexpr = 'nvim_treesitter#foldexpr()',
+        foldlevel = 99,
         foldmethod = 'expr',
         number = true,
         relativenumber = true,