Support public dir (#4783)

* Add optional static_dir support

- add optional application.static_dir field defaulting to none
- copy configured static directory into web output during build/serve
- document config knob and add unit tests
- force full rebuild when static_dir contents change
- sync removes stale outputs and logs copy activity
- track static manifest next to platform dir

Tests: cargo fmt

* default to public dir to match vite

* static_dir -> public_dir

* wip

* deser as none...

* wip... use .manifest.json

* implement dumb form of asset manifest generation

* implement manifest using asset system directly

* cleanup

* dont create extra asset dir for server

---------

Co-authored-by: Evan Almloff <evanalmloff@gmail.com>
Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/cli-opt/src/lib.rs

@@ -3,7 +3,7 @@ use manganis::AssetOptions;
 use manganis_core::BundledAsset;
 use rayon::iter::{IntoParallelRefIterator, ParallelIterator};
 use serde::{Deserialize, Serialize};
-use std::collections::{HashMap, HashSet};
+use std::collections::{BTreeMap, HashSet};
 use std::path::{Path, PathBuf};
 use std::sync::{Arc, RwLock};
 
@@ -25,7 +25,7 @@ pub use hash::add_hash_to_asset;
 #[derive(Debug, PartialEq, Default, Clone, Serialize, Deserialize)]
 pub struct AssetManifest {
     /// Map of bundled asset name to the asset itself
-    assets: HashMap<PathBuf, HashSet<BundledAsset>>,
+    assets: BTreeMap<PathBuf, HashSet<BundledAsset>>,
 }
 
 impl AssetManifest {