Blend animation direct change

- silence a few linter issues
- update default blend animation mix value to be 100. its either 0 or 100, 1 made no sense. i think 100 is right.
- made a clamped input converter to set values between 0 & 100 nicely & it rounds values when you drag

adds option for selecting setting the mix input or the mix value on uat @alxgibsn, what do we want this to say? "Set Blend Value? "Set Mix Value?

<img width="320" alt="image" src="https://user-images.githubusercontent.com/1216025/229121083-d8233155-4bce-475e-bdb3-697ebd951360.png">

can have both by input and by value, they look very subtlely different
<img width="272" alt="image" src="https://user-images.githubusercontent.com/1216025/229121329-f8bd8596-0247-42f9-bd82-1979778b8ad3.png">

Diffs=
d9fc7d927 Blend animation direct change (#5080)

.rive_head

diff --git a/.rive_head b/.rive_head
index 044102c..2744b5e 100644
--- a/.rive_head
+++ b/.rive_head
@@ -1 +1 @@
-6df791fe4cbf6f70dc026314400d88ce3fec0a79
+d9fc7d92736d3ac97fafc2f2713ec25211584799

dev/core_generator/lib/main.dart

diff --git a/dev/core_generator/lib/main.dart b/dev/core_generator/lib/main.dart
index 8538ea7..a48945c 100644
--- a/dev/core_generator/lib/main.dart
+++ b/dev/core_generator/lib/main.dart
@@ -1,8 +1,8 @@
 import 'dart:io';
 
-import 'package:core_generator/src/field_types/initialize.dart';
 import 'package:core_generator/src/configuration.dart';
 import 'package:core_generator/src/definition.dart';
+import 'package:core_generator/src/field_types/initialize.dart';
 
 void main(List<String> arguments) {
   initializeFields();

dev/core_generator/lib/src/field_type.dart

diff --git a/dev/core_generator/lib/src/field_type.dart b/dev/core_generator/lib/src/field_type.dart
index c5dd856..486bd92 100644
--- a/dev/core_generator/lib/src/field_type.dart
+++ b/dev/core_generator/lib/src/field_type.dart
@@ -1,7 +1,7 @@
 export 'package:core_generator/src/field_types/bool_field_type.dart';
+export 'package:core_generator/src/field_types/color_field_type.dart';
 export 'package:core_generator/src/field_types/double_field_type.dart';
 export 'package:core_generator/src/field_types/string_field_type.dart';
-export 'package:core_generator/src/field_types/color_field_type.dart';
 export 'package:core_generator/src/field_types/uint_field_type.dart';
 
 Map<String, FieldType> _types = <String, FieldType>{};

dev/defs/animation/blend_animation_direct.json

diff --git a/dev/defs/animation/blend_animation_direct.json b/dev/defs/animation/blend_animation_direct.json
index b15dfbb..303dc45 100644
--- a/dev/defs/animation/blend_animation_direct.json
+++ b/dev/defs/animation/blend_animation_direct.json
@@ -19,7 +19,7 @@
     },
     "mixValue": {
       "type": "double",
-      "initialValue": "1",
+      "initialValue": "100",
       "key": {
         "int": 297,
         "string": "mixvalue"

include/rive/generated/animation/blend_animation_direct_base.hpp

diff --git a/include/rive/generated/animation/blend_animation_direct_base.hpp b/include/rive/generated/animation/blend_animation_direct_base.hpp
index cb0f7bd..915c2d1 100644
--- a/include/rive/generated/animation/blend_animation_direct_base.hpp
+++ b/include/rive/generated/animation/blend_animation_direct_base.hpp
@@ -35,7 +35,7 @@
 
 private:
     uint32_t m_InputId = -1;
-    float m_MixValue = 1.0f;
+    float m_MixValue = 100.0f;
     uint32_t m_BlendSource = 0;
 
 public: