rename frontend to web and update contributing guide (#2509)

* rename frontend to web and update contributing guide

* rename this time

* fix build

* restructure rust code

* update documentation

* update descriptions

* Update CONTRIBUTING.md

Co-authored-by: J H <2364004+Blu-J@users.noreply.github.com>

---------

Co-authored-by: Aiden McClelland <me@drbonez.dev>
Co-authored-by: Aiden McClelland <3732071+dr-bonez@users.noreply.github.com>
Co-authored-by: J H <2364004+Blu-J@users.noreply.github.com>

core/startos/src/util/config.rs

@@ -0,0 +1,58 @@
+use std::fs::File;
+use std::path::{Path, PathBuf};
+
+use patch_db::Value;
+use serde::Deserialize;
+
+use crate::prelude::*;
+use crate::util::serde::IoFormat;
+use crate::{Config, Error};
+
+pub const DEVICE_CONFIG_PATH: &str = "/media/embassy/config/config.yaml";
+pub const CONFIG_PATH: &str = "/etc/embassy/config.yaml";
+pub const CONFIG_PATH_LOCAL: &str = ".embassy/config.yaml";
+
+pub fn local_config_path() -> Option<PathBuf> {
+    if let Ok(home) = std::env::var("HOME") {
+        Some(Path::new(&home).join(CONFIG_PATH_LOCAL))
+    } else {
+        None
+    }
+}
+
+/// BLOCKING
+pub fn load_config_from_paths<'a, T: for<'de> Deserialize<'de>>(
+    paths: impl IntoIterator<Item = impl AsRef<Path>>,
+) -> Result<T, Error> {
+    let mut config = Default::default();
+    for path in paths {
+        if path.as_ref().exists() {
+            let format: IoFormat = path
+                .as_ref()
+                .extension()
+                .and_then(|s| s.to_str())
+                .map(|f| f.parse())
+                .transpose()?
+                .unwrap_or_default();
+            let new = format.from_reader(File::open(path)?)?;
+            config = merge_configs(config, new);
+        }
+    }
+    from_value(Value::Object(config))
+}
+
+pub fn merge_configs(mut first: Config, second: Config) -> Config {
+    for (k, v) in second.into_iter() {
+        let new = match first.remove(&k) {
+            None => v,
+            Some(old) => match (old, v) {
+                (Value::Object(first), Value::Object(second)) => {
+                    Value::Object(merge_configs(first, second))
+                }
+                (first, _) => first,
+            },
+        };
+        first.insert(k, new);
+    }
+    first
+}