Rustic cleanups, dedups and making the code less hard to read in general (#251)

* typos :help_me:

* (part 1/?) massive cleanup to make the code more Rust-ic and cut down heap allocations.

* (part 2/?) massive cleanup to make the code more Rust-ic and cut down heap allocations.

* (part 3/?) cut down some pretty major heap allocations here - more Bytes and BytesMuts, less Vec<u8>s

also I don't really understand why you need to `to_vec` when you don't really use it again afterwards

* (part 4/?) deduplicate error handling in backblaze logic

* (part 5/?) fixes, cleanups, refactors, and reformatting

* (part 6/?) cleanups and refactors

* remove loads of `as_str` in types that already are `Display`

* Revert "remove loads of `as_str` in types that already are `Display`"

This reverts commit 4f974310cfb167ceba03001d81388db4f0fbb509.

* reformat and move routes util to the util module

* use streams

* Run prepare + formatting issues

Co-authored-by: Jai A <jaiagr+gpg@pm.me>
Co-authored-by: Geometrically <18202329+Geometrically@users.noreply.github.com>

src/util/env.rs

@@ -0,0 +1,10 @@
+use std::str::FromStr;
+
+pub fn parse_var<T: FromStr>(var: &'static str) -> Option<T> {
+    dotenv::var(var).ok().and_then(|i| i.parse().ok())
+}
+pub fn parse_strings_from_var(var: &'static str) -> Option<Vec<String>> {
+    dotenv::var(var)
+        .ok()
+        .and_then(|s| serde_json::from_str::<Vec<String>>(&s).ok())
+}