Replace gRPC Backend (#10)

**Rationale:**

Having two separate servers and communication methods resulted in additional maintenance & the need to convert often between backend & frontend data types.
By moving the backend communication off of gRPC and to just use websockets it both gives more control & allows for simplification of the implementation.

#8

**Changes:**

- Replaces gRPC backend.
  - New implementation automatically handles reconnect logic
- Implements an api layer
- Migrates examples to the api layer
- Implements a proc macro to make command handling easier
- Implements unit tests for the api layer (90+% coverage)
- Implements integration tests for the proc macro (90+% coverage)

Reviewed-on: #10
Co-authored-by: Sergey Savelyev <sergeysav.nn@gmail.com>
Co-committed-by: Sergey Savelyev <sergeysav.nn@gmail.com>

server/src/http/error.rs

@@ -3,13 +3,16 @@ use actix_web::http::header::ContentType;
 use actix_web::http::StatusCode;
 use actix_web::HttpResponse;
 use thiserror::Error;
+use uuid::Uuid;
 
 #[derive(Error, Debug)]
 pub enum HttpServerResultError {
     #[error("Telemetry Name Not Found: {tlm}")]
     TlmNameNotFound { tlm: String },
+    #[error("Invalid Uuid: {uuid}")]
+    InvalidUuid { uuid: String },
     #[error("Telemetry Uuid Not Found: {uuid}")]
-    TlmUuidNotFound { uuid: String },
+    TlmUuidNotFound { uuid: Uuid },
     #[error("DateTime Parsing Error: {date_time}")]
     InvalidDateTime { date_time: String },
     #[error("Timed out")]
@@ -17,7 +20,7 @@ pub enum HttpServerResultError {
     #[error("Internal Error")]
     InternalError(#[from] anyhow::Error),
     #[error("Panel Uuid Not Found: {uuid}")]
-    PanelUuidNotFound { uuid: String },
+    PanelUuidNotFound { uuid: Uuid },
     #[error(transparent)]
     Command(#[from] crate::command::error::Error),
 }
@@ -26,6 +29,7 @@ impl ResponseError for HttpServerResultError {
     fn status_code(&self) -> StatusCode {
         match self {
             HttpServerResultError::TlmNameNotFound { .. } => StatusCode::NOT_FOUND,
+            HttpServerResultError::InvalidUuid { .. } => StatusCode::BAD_REQUEST,
             HttpServerResultError::TlmUuidNotFound { .. } => StatusCode::NOT_FOUND,
             HttpServerResultError::InvalidDateTime { .. } => StatusCode::BAD_REQUEST,
             HttpServerResultError::Timeout => StatusCode::GATEWAY_TIMEOUT,