feat(sdk): with _opts methods

Now all opt values enter into a _opts function instead of the original.
This avoids a lot of verbosity for both None in the case opts are
unwanted, and Some() if they actually are.

They are used like so:

```rust
client.container().from("...");
client.container_opts(Some(ContainerOpts{ ... }))
```

Some from opts will be removed in a future commit/pr

crates/dagger-sdk/examples/publish-the-application/main.rs

@@ -5,7 +5,7 @@ fn main() -> eyre::Result<()> {
     let client = dagger_sdk::connect()?;
     let output = "examples/publish-the-application/app/build";
 
-    let host_source_dir = client.host().directory(
+    let host_source_dir = client.host().directory_opts(
         "examples/publish-the-application/app",
         Some(HostDirectoryOpts {
             exclude: Some(vec!["node_modules", "ci/"]),
@@ -14,35 +14,31 @@ fn main() -> eyre::Result<()> {
     );
 
     let source = client
-        .container(None)
+        .container()
         .from("node:16")
         .with_mounted_directory("/src", host_source_dir.id()?);
 
     let runner = source
         .with_workdir("/src")
-        .with_exec(vec!["npm", "install"], None);
+        .with_exec(vec!["npm", "install"]);
 
-    let test = runner.with_exec(vec!["npm", "test", "--", "--watchAll=false"], None);
+    let test = runner.with_exec(vec!["npm", "test", "--", "--watchAll=false"]);
 
     let _ = test
-        .with_exec(vec!["npm", "run", "build"], None)
+        .with_exec(vec!["npm", "run", "build"])
         .directory("./build")
         .export(output);
 
     let mut rng = rand::thread_rng();
 
     let ref_ = client
-        .container(None)
+        .container()
         .from("nginx")
         .with_directory(
             "/usr/share/nginx/html",
-            client.host().directory(output, None).id()?,
-            None,
+            client.host().directory(output).id()?,
         )
-        .publish(
-            format!("ttl.sh/hello-dagger-rs-{}:1h", rng.gen::<u64>()),
-            None,
-        )?;
+        .publish(format!("ttl.sh/hello-dagger-rs-{}:1h", rng.gen::<u64>()))?;
 
     println!("published image to: {}", ref_);