* Adds code genning for embedded objects. See `AquariumState` as an example.
* Adds code genning for fields that are `Timer`. See `Aquarium` as an example.
* Codegens aquariums
* Fixes missing option for most primitive field types.
**Note for Rider users** Code generation only works with Rider v2021.1+. For Rider 2021.1.x you must set a global msbuild attribute so that the IDE can recognize generated code after building. JetBrains claims this will be fixed in Rider 2021.2.
**Rider 2021.1 Required Setting for Code Generation**
<img width="945" alt="Screen Shot 2021-07-19 at 9 36 30 PM" src="https://user-images.githubusercontent.com/3953314/126262725-a4d58dd0-e9e0-400f-a172-0b29ef7a00d7.png">
**Note for VS 2019+ users**: Code generation requires completely cleaning your solution, doing a full build, closing VS 2019, and then opening the solution. This is a known issue and there are no plans to fix this multiple restart requirement for VS 2022 at this time.
Roslyn Source generators are not supposed to access I/O. To get around this we have to use `AdditionalFiles` to give the analyzer access to read/load the schema files.
To write the schema files we have to use a separate program altogether.
- [X] Adds SerializationSchemaGenerator
- [X] Splits out the SerializationGenerator code
