Merge master into staging-nixos

### Breaking changes {#sec-nixpkgs-release-25.11-lib-breaking}

- `lib.literalExample` has been removed, use `lib.literalExpression` instead, or use `lib.literalMD` for a non-Nix description.

- `lib.replaceChars` has been removed, it was a deprecated alias of `lib.replaceStrings`.

- `lib.readPathsFromFile` has been removed, use a list instead

- `lib.mapAttrsFlatten` has been removed, following its deprecation in NixOS 24.11. Use `lib.attrsets.mapAttrsToList` instead.

- `lib.strings.isCoercibleToString` has been in favor of either `lib.strings.isStringLike` or `lib.strings.isConvertibleWithToString`. Only use the latter if it needs to return true for null, numbers, booleans, or a list of those.

- `lib.types.string` has been removed. See [this pull request](https://github.com/NixOS/nixpkgs/pull/66346) for better alternative types like `lib.types.str`.

- `lib.modules.defaultPriority` has been removed, please use `lib.modules.defaultOverridePriority` instead.

- `lib.attrsets.cartesianProductOfSets` has been removed, following its deprecation in NixOS 24.11. Use `lib.attrsets.cartesianProduct` instead.

- `lib.sources.pathType`, `lib.sources.pathIsDirectory` and `lib.sources.pathIsRegularFile` have been replaced by `lib.filesystem.pathType`, `lib.filesystem.pathIsDirectory` and `lib.filesystem.pathIsRegularFile` respectively.

- `lib.attrsets.zip` has been removed, following its deprecation in 2013. Use `lib.attrsets.zipAttrsWith` instead.

- `lib.attrsets.zipWithNames` has been removed, following its deprecation in 2009. Use `lib.attrsets.zipAttrsWithNames` instead.

- `lib.options.mkPackageOptionMD` has been removed, following its deprecation in NixOS 24.11. Use `lib.options.mkPackageOption` instead.

- `haskell.lib.addOptparseApplicativeCompletionScripts` has been removed, use `haskellPackages.generateOptparseApplicativeCompletions` instead.

- The `buildPythonPackage` and `buildPythonApplication` functions now require

  an explicit `format` attribute. Previously the default format used setuptools

  and called `setup.py` from the source tree, which is deprecated.

    filterAttrs

    optionalString

    flip

    pathIsDirectory

    head

    pipe

    isDerivation

        escapeRegex

        escapeURL

        escapeXML

        replaceChars

        lowerChars

        upperChars

        toLower

        fixedWidthNumber

        toInt

        toIntBase10

        readPathsFromFile

        fileContents

        ;

      inherit (self.stringsWithDeps)

        optionAttrSetToDocList'

        scrubOptionValue

        literalExpression

        literalExample

        showOption

        showOptionWithDefLocs

        showFiles

  mkForce = mkOverride 50;

  mkVMOverride = mkOverride 10; # used by ‘nixos-rebuild build-vm’

  defaultPriority =

    warnIf (oldestSupportedReleaseIsAtLeast 2305)

      "lib.modules.defaultPriority is deprecated, please use lib.modules.defaultOverridePriority instead."

      defaultOverridePriority;

  mkFixStrictness = warn "lib.mkFixStrictness has no effect and will be removed. It returns its argument unmodified, so you can just remove any calls." id;

  mkOrder = priority: content: {

  inherit

    defaultOrderPriority

    defaultOverridePriority

    defaultPriority

    doRename

    evalModules

    evalOptionValue # for use by lib.types

        inherit text;

      };

  literalExample = lib.warn "lib.literalExample is deprecated, use lib.literalExpression instead, or use lib.literalMD for a non-Nix description." literalExpression;

  /**

    For use in the `defaultText` and `example` option attributes. Causes the

    given MD text to be inserted verbatim in the documentation, for when