Extract fj-host from fj-app

This is the plugin host code for the models. Recycles the `fj-host`
crate name.

Cargo.toml

@@ -4,6 +4,7 @@ members = [
     "fj",
     "fj-app",
     "fj-debug",
+    "fj-host",
     "fj-kernel",
     "fj-math",
     "fj-operations",
@@ -18,6 +19,7 @@ members = [
 default-members = [
     "fj-app",
     "fj-debug",
+    "fj-host",
     "fj-kernel",
     "fj-math",
     "fj-operations",

fj-app/Cargo.toml

@@ -15,9 +15,7 @@ categories  = ["mathematics", "rendering"]
 anyhow      = "1.0.56"
 bytemuck    = "1.8.0"
 futures     = "0.3.21"
-libloading  = "0.7.2"
 nalgebra    = "0.30.0"
-notify      = "5.0.0-pre.14"
 parry3d-f64 = "0.8.0"
 thiserror   = "1.0.30"
 threemf     = "0.2.0"
@@ -42,6 +40,10 @@ path    = "../fj"
 version = "0.5.0"
 path    = "../fj-debug"
 
+[dependencies.fj-host]
+version = "0.5.0"
+path    = "../fj-host"
+
 [dependencies.fj-math]
 version = "0.5.0"
 path    = "../fj-math"

fj-app/src/main.rs

@@ -4,13 +4,13 @@ mod config;
 mod graphics;
 mod input;
 mod mesh;
-mod model;
 mod window;
 
 use std::path::PathBuf;
 use std::{collections::HashMap, time::Instant};
 
 use fj_debug::DebugInfo;
+use fj_host::Model;
 use fj_math::{Aabb, Scalar, Triangle};
 use fj_operations::ToShape as _;
 use futures::executor::block_on;
@@ -28,7 +28,6 @@ use crate::{
     config::Config,
     graphics::{DrawConfig, Renderer},
     mesh::MeshMaker,
-    model::Model,
     window::Window,
 };
 

fj-host/Cargo.toml

@@ -4,6 +4,17 @@ version = "0.5.0"
 edition = "2021"
 
 description = "The world needs another CAD program."
-readme      = "README.md"
+readme      = "../README.md"
 repository  = "https://github.com/hannobraun/fornjot"
 license     = "0BSD"
+keywords    = ["cad", "programmatic", "code-cad"]
+
+
+[dependencies]
+libloading = "0.7.2"
+notify     = "5.0.0-pre.14"
+thiserror  = "1.0.30"
+
+[dependencies.fj]
+version = "0.5.0"
+path    = "../fj"