refactor: Migrate from Protobuf-Java to Wire

[jamesarich]

This commit migrates the project from using the protobuf-java library to wire. This involves extensive changes across the codebase to adapt to the new generated models and their APIs.

Key changes include:

• Replaced Protobuf builders with Wire's immutable data classes and copy() method.
• Updated field access from camelCase (longName) to snake_case (long_name).
• Switched from com.google.protobuf.ByteString to okio.ByteString.
• Replaced Protobuf's hasField() checks with null checks on Wire's optional fields.
• Adapted enum handling to work with Wire-generated enums, removing "UNRECOGNIZED" filters.
• Removed Protobuf-specific utility code, such as userFieldsToString and compareUsers which relied on Descriptors.
• Updated Gradle build scripts (build.gradle.kts, libs.versions.toml) to remove Protobuf dependencies and add Wire dependencies and the Wire plugin.
• Updated ProGuard rules to keep Wire-generated classes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (46a2c68) to head (b8ed6ba).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #4246   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
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  Files          3       3           
  Lines         23      23           
  Branches       7       7           
=====================================
  Misses        23      23           

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[yschimke]

What about continuing the Okio types to here?

    @Serializable(with = ByteStringSerializer::class)
    @TypeParceler<ByteString?, ByteStringParceler>
    var bytes: ByteString?,

and

object ByteStringSerializer : KSerializer<ByteString> {
    val byteArraySerializer = ByteArraySerializer()
    override val descriptor: SerialDescriptor = byteArraySerializer.descriptor

    override fun serialize(encoder: Encoder, value: ByteString) {
        byteArraySerializer.serialize(encoder, value.toByteArray())
    }

    override fun deserialize(decoder: Decoder): ByteString {
        return byteArraySerializer.deserialize(decoder).toByteString()
    }
}

object ByteStringParceler : Parceler<ByteString?> {
    override fun create(parcel: Parcel): ByteString? {
        return parcel.createByteArray()?.toByteString()
    }

    override fun ByteString?.write(parcel: Parcel, flags: Int) {
        parcel.writeByteArray(this?.toByteArray())
    }
}

[yschimke]

If you use ByteString for the type, I think you can delete equals/hashCode. And maybe readFromParcel.

[yschimke]

readFromParcel might be needed for the inout param on send.