Fix: replace 'instant' dependency with 'web-time' (#296)

# The Bug
While using this crate, I encounered an error with my project's wasm
build that went something like this:
```
Module not found: Error: Can't resolve 'env' in 'my-project/pkg'
```

# Finding the source
After a little searching, I found this [helpful
issue](https://github.com/orgs/community/discussions/16289#discussion-4062908)
on the wasm-bindgen repository. I used [this tool](
https://github.com/Liamolucko/find_wasm_import) (mentioned in the issue)
on my project to attempt to find the source of the error, and the source
was the instant crate.

# Solution
In all regards, web_time seems to be superior to instant. Instant even
mentions in [their
readme](https://github.com/sebcrozet/instant/blob/master/README.md) that
the crate is unmaintained and web_time should be considered as an
alternative.

---------

Co-authored-by: Dmitrii Samsonov <[email protected]>

Author: WaffleSoul4

Cargo.toml

@@ -40,7 +40,7 @@ petgraph = { version = "0.8", default-features = false }
 serde = "1.0"
 serde_json = "1.0"
 rand = "0.9"
-instant = { version = "0.1", features = ["wasm-bindgen"] }
+web-time = "1.1"
 crossbeam = "0.8"
 bevy = "0.17"
 bevy_egui = "0.38"

crates/demo-core/Cargo.toml

@@ -20,7 +20,7 @@ petgraph = { workspace = true, default-features = false, features = [
   "matrix_graph",
 ] }
 rand.workspace = true
-instant.workspace = true
+web-time.workspace = true
 crossbeam = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json.workspace = true

crates/demo-core/src/lib.rs

@@ -6,13 +6,13 @@ use egui_graphs::{
     FruchtermanReingoldWithCenterGravityState, Graph, LayoutForceDirected, LayoutHierarchical,
     LayoutHierarchicalOrientation, LayoutStateHierarchical,
 };
-#[cfg(not(feature = "events"))]
-use instant::Instant;
 use petgraph::stable_graph::{DefaultIx, EdgeIndex, NodeIndex};
 use petgraph::{Directed, Undirected};
 use rand::Rng;
 #[cfg(all(feature = "events", target_arch = "wasm32"))]
 use std::{cell::RefCell, rc::Rc};
+#[cfg(not(feature = "events"))]
+use web_time::Instant;
 
 mod event_filters;
 mod graph_ops;

crates/demo-core/src/metrics.rs

@@ -1,6 +1,6 @@
 use core::time::Duration;
-use instant::Instant;
 use std::collections::VecDeque;
+use web_time::Instant;
 
 pub struct MetricsRecorder {
     fps: f32,

crates/demo-core/src/status.rs

@@ -1,5 +1,5 @@
-use instant::Instant;
 use std::collections::VecDeque;
+use web_time::Instant;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum StatusKind {

crates/egui_graphs/Cargo.toml

@@ -22,7 +22,7 @@ petgraph = { workspace = true, default-features = false, features = [
   "serde-1",
 ] }
 serde = { workspace = true, features = ["derive"] }
-instant.workspace = true
+web-time.workspace = true
 
 crossbeam = { workspace = true, optional = true }
 

crates/egui_graphs/src/graph_view.rs

@@ -9,7 +9,7 @@ use crate::{
 };
 
 use egui::{Id, PointerButton, Pos2, Rect, Response, Sense, Ui, Vec2, Widget};
-use instant::Instant;
+use web_time::Instant;
 
 use petgraph::{graph::EdgeIndex, stable_graph::DefaultIx};
 use petgraph::{graph::IndexType, Directed};