Add remote store protobuf/gRPC definitions (#7674)

In this PR we aim to define initial version of the V0 storage node APIs
in the form of grpc protobuf definition. We also want to:
* settle on code generation
* type conversions (between rerun internal types and grpc types

(currently) Example usage:

```rust

use re_storage_types::v0::{
    storage_node_client::StorageNodeClient, RegisterRecordingsRequest
};

...

  let mut client = StorageNodeClient::connect("http://127.0.0.1:51234")
        .await
        .unwrap();

    let resp = client
        .register_recordings(RegisterRecordingsRequest {
            description: "test".to_string(),
            obj_storage:  ObjectStore {
              url: "dna.rd",
              bucket_name: "my_s3_bucket",
            },
            typ: re_storage_types::v0::RecordingType::Rrd.into(),
        })
        .await
        .unwrap()
        .into_inner();
```

---------

Co-authored-by: Clement Rey <cr.rey.clement@gmail.com>

ARCHITECTURE.md

@@ -159,14 +159,15 @@ Update instructions:
 
 ### Application-level store
 
-| Crate                | Description                                                              |
-|----------------------|--------------------------------------------------------------------------|
-| re_entity_db         | In-memory storage of Rerun entities                                      |
-| re_query             | Querying data in the re_chunk_store                                      |
-| re_dataframe         | The Rerun public data APIs.                                              |
-| re_types             | The built-in Rerun data types, component types, and archetypes.          |
-| re_types_blueprint   | The core traits and types that power Rerun's Blueprint sub-system.       |
-| re_log_encoding      | Helpers for encoding and transporting Rerun log messages                 |
+| Crate                 | Description                                                              |
+|-----------------------|--------------------------------------------------------------------------|
+| re_entity_db          | In-memory storage of Rerun entities                                      |
+| re_query              | Querying data in the re_chunk_store                                      |
+| re_dataframe          | The Rerun public data APIs.                                              |
+| re_remote_store_types | Rerun remote store gRPC API types                                        |
+| re_types              | The built-in Rerun data types, component types, and archetypes.          |
+| re_types_blueprint    | The core traits and types that power Rerun's Blueprint sub-system.       |
+| re_log_encoding       | Helpers for encoding and transporting Rerun log messages                 |
 
 
 ### Low-level store
@@ -193,12 +194,13 @@ Update instructions:
 
 ### Build support
 
-| Crate                      | Description                                                      |
-|----------------------------|------------------------------------------------------------------|
-| re_build_info              | Information about the build. Use together with re_build_tools    |
-| re_build_tools             | build.rs helpers for generating build info                       |
-| re_types_builder           | Generates code for Rerun's SDKs from flatbuffers definitions.    |
-| re_dev_tools               | Various tools for Rerun development. Each tool has a subcommand. |
+| Crate                         | Description                                                      |
+|-------------------------------|------------------------------------------------------------------|
+| re_build_info                 | Information about the build. Use together with re_build_tools    |
+| re_build_tools                | build.rs helpers for generating build info                       |
+| re_remote_store_types_builder | Generates code for Rerun remote store gRPC API                   |
+| re_types_builder              | Generates code for Rerun's SDKs from flatbuffers definitions.    |
+| re_dev_tools                  | Various tools for Rerun development. Each tool has a subcommand. |
 
 
 ### Utilities

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 ## [0.19.0](https://github.com/rerun-io/rerun/compare/0.18.2...0.19.0) - Dataframes & Video support
 
+
 <!-- TODO(emilk): insert a screenshot and/or code sample here -->
 
 📖 Release blogpost: Coming soon! <!-- TODO(niko): link to it! -->