Adds bacalhau support

Adds a destination node for bacalhau that is able to submit jobs to a
local requester node, using the orchestrator API.

Each instance of the destination node is configured with the location of
the jobstore, a local directory containing .yaml files describing jobs.
It should also be provided with the job name (one of the .yaml files)
so that it might be configured with the following

```
jobstore: /tmp/jobstore
job: process
```

and will load /tmp/jobstore/process.yaml as the job specification.  Once
loaded the job specification can be templated using handlebars syntax,
so that {{key}} will be replaced with values from the 'key' field in the
input message.

.gitignore

@@ -12,3 +12,5 @@ Cargo.lock
 
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
+
+.vscode/

Cargo.toml

@@ -6,6 +6,7 @@ members = [
     "pipe/runtime",
     "pipe/arrow_msg",
     "pipe/section",
+    "pipe/section/section_impls/bacalhau",
     "pipe/section/section_impls/hello_world",
     "pipe/section/section_impls/sqlite_connector",
     "pipe/section/section_impls/excel_connector",

common/src/lib.rs

@@ -53,6 +53,7 @@ pub enum Destination {
     Sqlite_Connector(SqliteConnectorConfig),
     Snowflake(SnowflakeConfig),
     Sqlite_Physical_Replication(SqlitePhysicalReplicationDestinationConfig),
+    Bacalhau(BacalhauDestinationConfig),
     Hello_World(HelloWorldDestinationConfig),
     Kafka(KafkaDestinationConfig),
     Postgres_Connector(PostgresConnectorDestinationConfig),
@@ -115,6 +116,14 @@ pub struct SqlitePhysicalReplicationSourceConfig {
     // database path
 }
 
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct BacalhauDestinationConfig {
+    #[serde(flatten)]
+    pub common_attrs: CommonAttrs,
+    pub job: String,
+    pub jobstore: String,
+}
+
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct HelloWorldSourceConfig {
     #[serde(flatten)]