docs: Add inline anchors for direct linking to GVariant types

docs/writing-modules.adoc

@@ -77,12 +77,12 @@ foo.bar = {
 +
 would place `c` before `b` and after `a` in the graph.
 
-`hm.types.gvariant`::
+[[sec-option-types-gvariant]]`hm.types.gvariant`::
 This type is useful for options representing {gvariant-description}[GVariant] values. The type accepts all primitive GVariant types as well as arrays and tuples. Dictionaries are not currently supported.
 +
 To create a GVariant value you can use a number of provided functions. Examples assume an option `foo.bar`  of type `hm.types.gvariant`.
 +
-`hm.gvariant.mkBoolean (v: bool)`:::
+[[sec-option-types-gvariant-mkBoolean]]`hm.gvariant.mkBoolean (v: bool)`:::
 Takes a Nix value `v` to a GVariant `boolean` value. Note, Nix booleans are automatically coerced using this function. That is,
 +
 [source,nix]
@@ -96,7 +96,7 @@ is equivalent to
 ----
 foo.bar = true;
 ----
-`hm.gvariant.mkString (v: string)`:::
+[[sec-option-types-gvariant-mkString]]`hm.gvariant.mkString (v: string)`:::
 Takes a Nix value `v` to a GVariant `string` value. Note, Nix strings are automatically coerced using this function. That is,
 +
 [source,nix]
@@ -110,15 +110,15 @@ is equivalent to
 ----
 foo.bar = "a string";
 ----
-`hm.gvariant.mkObjectpath (v: string)`:::
+[[sec-option-types-gvariant-mkObjectpath]]`hm.gvariant.mkObjectpath (v: string)`:::
 Takes a Nix value `v` to a GVariant `objectpath` value.
-`hm.gvariant.mkUchar (v: string)`:::
+[[sec-option-types-gvariant-mkUchar]]`hm.gvariant.mkUchar (v: string)`:::
 Takes a Nix value `v` to a GVariant `uchar` value.
-`hm.gvariant.mkInt16 (v: int)`:::
+[[sec-option-types-gvariant-mkInt16]]`hm.gvariant.mkInt16 (v: int)`:::
 Takes a Nix value `v` to a GVariant `int16` value.
-`hm.gvariant.mkUint16 (v: int)`:::
+[[sec-option-types-gvariant-mkUint16]]`hm.gvariant.mkUint16 (v: int)`:::
 Takes a Nix value `v` to a GVariant `uint16` value.
-`hm.gvariant.mkInt32 (v: int)`:::
+[[sec-option-types-gvariant-mkInt32]]`hm.gvariant.mkInt32 (v: int)`:::
 Takes a Nix value `v` to a GVariant `int32` value. Note, Nix integers are automatically coerced using this function. That is,
 +
 [source,nix]
@@ -132,13 +132,13 @@ is equivalent to
 ----
 foo.bar = 7;
 ----
-`hm.gvariant.mkUint32 (v: int)`:::
+[[sec-option-types-gvariant-mkUint32]]`hm.gvariant.mkUint32 (v: int)`:::
 Takes a Nix value `v` to a GVariant `uint32` value.
-`hm.gvariant.mkInt64 (v: int)`:::
+[[sec-option-types-gvariant-mkInt64]]`hm.gvariant.mkInt64 (v: int)`:::
 Takes a Nix value `v` to a GVariant `int64` value.
-`hm.gvariant.mkUint64 (v: int)`:::
+[[sec-option-types-gvariant-mkUint64]]`hm.gvariant.mkUint64 (v: int)`:::
 Takes a Nix value `v` to a GVariant `uint64` value.
-`hm.gvariant.mkDouble (v: double)`:::
+[[sec-option-types-gvariant-mkDouble]]`hm.gvariant.mkDouble (v: double)`:::
 Takes a Nix value `v` to a GVariant `double` value. Note, Nix floats are automatically coerced using this function. That is,
 +
 [source,nix]
@@ -153,7 +153,7 @@ is equivalent to
 foo.bar = 3.14;
 ----
 +
-`hm.gvariant.mkArray type elements`:::
+[[sec-option-types-gvariant-mkArray]]`hm.gvariant.mkArray type elements`:::
 Builds a GVariant array containing the given list of elements, where each element is a GVariant value of the given type. The `type` value can be constructed using
 +
 --
@@ -176,20 +176,20 @@ Builds a GVariant array containing the given list of elements, where each elemen
 +
 where `type` and `types` are themselves a type and list of types, respectively.
 +
-`hm.gvariant.mkEmptyArray type`:::
+[[sec-option-types-gvariant-mkEmptyArray]]`hm.gvariant.mkEmptyArray type`:::
 An alias of `hm.gvariant.mkArray type []`.
 +
-`hm.gvariant.mkNothing type`:::
+[[sec-option-types-gvariant-mkNothing]]`hm.gvariant.mkNothing type`:::
 Builds a GVariant maybe value whose (non-existent) element is of the given type. The `type` value is constructed as described for the `mkArray` function above.
 +
-`hm.gvariant.mkJust element`:::
+[[sec-option-types-gvariant-mkJust]]`hm.gvariant.mkJust element`:::
 Builds a GVariant maybe value containing the given GVariant element.
 +
-`hm.gvariant.mkTuple elements`:::
+[[sec-option-types-gvariant-mkTuple]]`hm.gvariant.mkTuple elements`:::
 Builds a GVariant tuple containing the given list of elements, where each element is a GVariant value.
 +
-`hm.gvariant.mkVariant element`:::
+[[sec-option-types-gvariant-mkVariant]]`hm.gvariant.mkVariant element`:::
 Builds a GVariant variant which contains the value of a GVariant element.
 +
-`hm.gvariant.mkDictionaryEntry elements`:::
+[[sec-option-types-gvariant-mkDictionaryEntry]]`hm.gvariant.mkDictionaryEntry elements`:::
 Builds a GVariant dictionary entry containing the given list of elements, where each element is a GVariant value.