Migration to new Rust-based engine (#401)

* wasm first steps

* parsing start

* parsing continued

* progress

* progress

* progress

* progress

* progress

* progress

* progress

* progress

* fixes

* reorganize

* change type

* fix

* progress

* refactoring

* progress

* progress

* progress

* keep style info

* progress

* progress

* remove (copy) in name

* progress

* merge methods into 1

* splice

* progress

* progress

* progress

* cleaning

* progress

* progress

* progress

* visibility

* progress

* progress

* progress

* progress

* progress

* fixes

* progress

* fix markers

* fix

* progress

* progress

* progress

* progress

* progress

* progress

* small fix

* use engine info

* fix popups

* small fix

* progress

* progress

* progress

* clean tool

* handle self closing elements

* reduce data exchanges across boundary

* copy on wasm side to avoid any data corruption

* speed fix

* routing

* refactoring

* reverse

* reverse

* crop

* split

* merge

* progress

* time tool

* fix bounds for waypoints

* reduce

* fix reactivity

* handle corrupt time data

* export

* progress

* remove gpx js package

* remove todo

* update readme

* cleaning

* progress

* fix link fields

* remove unused fields

* refactoring and tests

* import and export of routes, ref #192

* per-chunk categories storage

* cross-tab sync

* outdated state

* refactoring

* reorder methods

* refactoring

* fix

* improve flow

* renaming

* progress

* progress

* fix

* progress

* per file history

* keep original flag

* use history variant

* fix

* progress

* file explorer

* progress

* fix

* sticky folders

* improved sticky folders

* fix sortable

* fix sortable

* fix

* fix tab size

* no file delete on desktop

* fix routing on other file

* fix sorting

* remember language

* open links in browser

* commit missing changes

* avoid selecting on resize

* clarify filename

* explorer actions

* fix folder styling

* drop anywhere in folder

* cleaning

* fixes

* remove focus-ring

* full screen

* small fix

* consistent highlight color

* improved preview

* performance improvements

* sparser data transfers

* sparser data transfers

* show popup once data is loaded

* fix routing control size

* fix

* sparse desktop build

* remove custom ign styles

* use new endpoint for openhikingmap

* strip native menu

* reorder context menu items

* route full support

* route - track conversion

* create route file action

* route export, filter out anchors at high zoom level

* clarify name handling

* move hide & center to view

* routes continued

* update docs

* fix power format, closes #378

* lint fixes

* fix display of additional data with gaps, closes #361

* fix linting issues

* fix import modules

* fix multidrag

* change base to resolve

* fix type errors

* fix layer typings

* fix last type error

* each keys

* improve typings

* deploy to cloudflare

---------

Co-authored-by: vcoppe <vcoppe@hexaly.com>

README.md

@@ -25,19 +25,20 @@ Any help is greatly appreciated!
 
 ## Development
 
-The code is split into two parts:
+The code is split into four parts:
 
-- `gpx`: a Typescript library for parsing and manipulating GPX files,
-- `website`: the website itself, which is a [SvelteKit](https://kit.svelte.dev/) application.
+- `gpx-rs`: a Rust library for parsing and manipulating GPX files (the engine), and the interface to it that the next two share (`gpx_engine::api`),
+- `wasm`: the engine for the browser, compiled to WebAssembly,
+- `tauri`: the desktop app, which runs the engine natively,
+- `website`: the website itself, which is a [SvelteKit](https://kit.svelte.dev/) application. It also is the UI of the desktop app.
 
-You will need [Node.js](https://nodejs.org/) to build and run these two parts.
+You will need [Node.js](https://nodejs.org/), [Rust](https://rustup.rs/) and [wasm-pack](https://rustwasm.github.io/wasm-pack/) to build and run the website. See [`tauri`](tauri/README.md) for the desktop app.
 
-### Building the `gpx` library
+### Building the WebAssembly engine
 
 ```bash
-cd gpx
-npm install
-npm run build
+cd wasm
+wasm-pack build --target bundler
 ```
 
 ### Running the website
@@ -64,9 +65,6 @@ This project has been made possible thanks to the following open source projects
     - [tailwindcss](https://github.com/tailwindlabs/tailwindcss) — easy styling
     - [Chart.js](https://github.com/chartjs/Chart.js) — beautiful and fast charts
 - Logic:
-    - [immer](https://github.com/immerjs/immer) — complex state management
-    - [Dexie.js](https://github.com/dexie/Dexie.js) — IndexedDB wrapper
-    - [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser) — fast GPX file parsing
     - [SortableJS](https://github.com/SortableJS/Sortable) — creating a sortable file tree
 - Mapping:
     - [MapLibre GL JS](https://github.com/maplibre/maplibre-gl-js) — beautiful and fast interactive map rendering