deepin.dtk6: init

[wineee]

Description of changes

close: #296102

The basic development library of deepin desktop environment build on qt 6

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[SuperSandro2000]

we should try to upstream the patches

[wineee]

we should try to upstream the patches

Fix build for qt 6.7 has already merged linuxdeepin/dtkwidget#570

But there are some obstacles to upstream patches for cmake path：
only on NixOS CMAKE_INSTALL_LIBDIR is an absolute path, these patches will cause the prefix (generally /usr) to be missing on other distribution.
I used '-DCMAKE_INSTALL_LIBDIR=lib' before, but it doesn't work for multiple-outputs，this makes CMAKE_INSTALL_PREFIX no longer reliable, includedir and libdir have different PREFIX

[SuperSandro2000]

only on NixOS CMAKE_INSTALL_LIBDIR is an absolute path, these patches will cause the prefix (generally /usr) to be missing on other distribution.

NixOS often exposes errors in cmake usages where the variables are used incorrectly because we rely on install dir and install prefix.

I used '-DCMAKE_INSTALL_LIBDIR=lib' before, but it doesn't work for multiple-outputs，this makes CMAKE_INSTALL_PREFIX no longer reliable, includedir and libdir have different PREFIX

Then there is likely another issue somewhere else because that is a fix we usually use.