Process manager templating & game importing (#96)

* feat: add new template options, asahi support, and refactoring

* feat: install dir scanning, validation fixes, progress fixes, download manager refactor

This kind of ballooned out of scope, but I implemented some much
needed fixes for the download manager.

First off, I cleanup the Downloadable trait, there was some
duplication of function.

Second, I refactored the "validate" into the GameDownloadAgent,
which calls a 'validate_chunk_logic' yada, same structure as
downloading.

Third, I fixed the progress and validation issues.

Fourth, I added game scanning

* feat: out of box support for Asahi Linux

* fix: clippy

* fix: don't break database

src-tauri/Cargo.lock

@@ -1284,7 +1284,7 @@ dependencies = [
 
 [[package]]
 name = "drop-app"
-version = "0.3.1-mac"
+version = "0.3.1"
 dependencies = [
  "atomic-instant-full",
  "bitcode",
@@ -1306,6 +1306,7 @@ dependencies = [
  "log4rs",
  "md5",
  "native_model",
+ "page_size",
  "parking_lot 0.12.3",
  "rand 0.9.1",
  "rayon",
@@ -3523,6 +3524,16 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "page_size"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30d5b2194ed13191c1999ae0704b7839fb18384fa22e49b57eeaa97d79ce40da"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "pango"
 version = "0.18.3"