feat: introduce google.type.Decimal (#133)

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/41b21f1c-fcf3-4beb-a6c4-2a4c1f3a40b8/targets

- [ ] To automatically regenerate this PR, check this box. (May take up to 24 hours.)

PiperOrigin-RevId: 364894175
Source-Link: googleapis/googleapis@15c5e21

Author: yoshi-automation

proto-google-common-protos/src/main/java/com/google/type/Color.java

@@ -68,13 +68,13 @@ public interface ColorOrBuilder
    * <pre>
    * The fraction of this color that should be applied to the pixel. That is,
    * the final pixel color is defined by the equation:
-   *   pixel color = alpha * (this color) + (1.0 - alpha) * (background color)
+   *   `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)`
    * This means that a value of 1.0 corresponds to a solid color, whereas
    * a value of 0.0 corresponds to a completely transparent color. This
    * uses a wrapper message rather than a simple float scalar so that it is
    * possible to distinguish between a default value and the value being unset.
-   * If omitted, this color object is to be rendered as a solid color
-   * (as if the alpha value had been explicitly given with a value of 1.0).
+   * If omitted, this color object is rendered as a solid color
+   * (as if the alpha value had been explicitly given a value of 1.0).
    * </pre>
    *
    * <code>.google.protobuf.FloatValue alpha = 4;</code>
@@ -88,13 +88,13 @@ public interface ColorOrBuilder
    * <pre>
    * The fraction of this color that should be applied to the pixel. That is,
    * the final pixel color is defined by the equation:
-   *   pixel color = alpha * (this color) + (1.0 - alpha) * (background color)
+   *   `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)`
    * This means that a value of 1.0 corresponds to a solid color, whereas
    * a value of 0.0 corresponds to a completely transparent color. This
    * uses a wrapper message rather than a simple float scalar so that it is
    * possible to distinguish between a default value and the value being unset.
-   * If omitted, this color object is to be rendered as a solid color
-   * (as if the alpha value had been explicitly given with a value of 1.0).
+   * If omitted, this color object is rendered as a solid color
+   * (as if the alpha value had been explicitly given a value of 1.0).
    * </pre>
    *
    * <code>.google.protobuf.FloatValue alpha = 4;</code>
@@ -108,13 +108,13 @@ public interface ColorOrBuilder
    * <pre>
    * The fraction of this color that should be applied to the pixel. That is,
    * the final pixel color is defined by the equation:
-   *   pixel color = alpha * (this color) + (1.0 - alpha) * (background color)
+   *   `pixel color = alpha * (this color) + (1.0 - alpha) * (background color)`
    * This means that a value of 1.0 corresponds to a solid color, whereas
    * a value of 0.0 corresponds to a completely transparent color. This
    * uses a wrapper message rather than a simple float scalar so that it is
    * possible to distinguish between a default value and the value being unset.
-   * If omitted, this color object is to be rendered as a solid color
-   * (as if the alpha value had been explicitly given with a value of 1.0).
+   * If omitted, this color object is rendered as a solid color
+   * (as if the alpha value had been explicitly given a value of 1.0).
    * </pre>
    *
    * <code>.google.protobuf.FloatValue alpha = 4;</code>

proto-google-common-protos/src/main/java/com/google/type/ColorOrBuilder.java

@@ -31,7 +31,8 @@
  * * A year on its own, with zero month and day values
  * * A year and month value, with a zero day, such as a credit card expiration
  * date
- * Related types are [google.type.TimeOfDay][google.type.TimeOfDay] and `google.protobuf.Timestamp`.
+ * Related types are [google.type.TimeOfDay][google.type.TimeOfDay] and
+ * `google.protobuf.Timestamp`.
  * </pre>
  *
  * Protobuf type {@code google.type.Date}
@@ -369,7 +370,8 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    * * A year on its own, with zero month and day values
    * * A year and month value, with a zero day, such as a credit card expiration
    * date
-   * Related types are [google.type.TimeOfDay][google.type.TimeOfDay] and `google.protobuf.Timestamp`.
+   * Related types are [google.type.TimeOfDay][google.type.TimeOfDay] and
+   * `google.protobuf.Timestamp`.
    * </pre>
    *
    * Protobuf type {@code google.type.Date}