nix/flake.lock: Update; nix/flake.nix: backport patches from NixOS/ni…

…xpkgs (#6540)

* nix/flake.nix: harfbuzz: 8.4.0 -> 9.0.0

* nix/flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a?narHash=sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ%3D' (2024-09-17)
  → 'github:numtide/flake-utils/11707dc2f618dd54ca8739b309ec4fc024de578b?narHash=sha256-l0KFg5HjrsfsO/JpG%2Br7fRrqm12kzFHyUHqHCVpMMbI%3D' (2024-11-13)
• Updated input 'harfbuzz':
    'github:harfbuzz/harfbuzz/63973005bc07aba599b47fdd4cf788647b601ccd?narHash=sha256-GdxcAPx5QyniSHPAN1ih28AD9JLUPR0ItqW9JEsl3pU%3D' (2024-03-29)
  → 'github:harfbuzz/harfbuzz/9c03576c49db6e7207d9bcdfe3abd170a809157f?narHash=sha256-2ieCf3ftNk851FZBDPVl%2B7QHWBqD729KiUxUyxi26Yg%3D' (2024-06-27)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/ccc0c2126893dd20963580b6478d1a10a4512185?narHash=sha256-4HQI%2B6LsO3kpWTYuVGIzhJs1cetFcwT7quWCk/6rqeo%3D' (2024-10-18)
  → 'github:NixOS/nixpkgs/69b9a8c860bdbb977adfa9c5e817ccb717884182?narHash=sha256-5zJyv66q68QZJZsXtmjDBazGnF0id593VSy%2B8eSckoo%3D' (2024-12-31)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/ada8266712449c4c0e6ee6fcbc442b3c217c79e1?narHash=sha256-r0VyeJxy4O4CgTB/PNtfQft9fPfN1VuGvnZiCxDArvg%3D' (2024-10-21)
  → 'github:oxalica/rust-overlay/04d5f1836721461b256ec452883362c5edc5288e?narHash=sha256-tIl5p3ueaPw7T5T1UXkLc8ISMk6Y8CI/D/rd0msf73I%3D' (2025-01-02)

* nix/flake.nix: backport patches from NixOS/nixpkgs

* nix/flake.nix: add formatter

* nix/flake.nix: zlib: 1.2.11 -> 1.3.1

* nix/flake.lock: Update

Flake lock file updates:

• Updated input 'zlib':
    'github:madler/zlib/cacf7f1d4e3d44d871b605da3b647f07d718623f?narHash=sha256-j5b6aki1ztrzfCqu8y729sPar8GpyQWIrajdzpJC%2Bww%3D' (2017-01-15)
  → 'github:madler/zlib/51b7f2abdade71cd9bb0e7a373ef2610ec6f9daf?narHash=sha256-TkPLWSN5QcPlL9D0kc/yhH0/puE9bFND24aj5NVDKYs%3D' (2024-01-22)

* nix/flake.nix: libpng: 8439534daa1d3a5705ba92e653eda9251246dd61 -> 1.6.44

* nix/flake.lock: Update

Flake lock file updates:

• Updated input 'libpng':
    'github:glennrp/libpng/8439534daa1d3a5705ba92e653eda9251246dd61?narHash=sha256-1%2BcRp0Ungme/OGfc9kGJbklYIWAFxk8Il1M%2BNV4KSgw%3D' (2019-02-04)
  → 'github:pnggroup/libpng/f5e92d76973a7a53f517579bc95d61483bf108c0?narHash=sha256-gBfHgGaqVYdmhWXoNKZzPyGzyw2rr3zp%2BDjWmfC41jk%3D' (2024-09-12)