feat(install): install feature, installing mods into mods directory

src/models/install.rs

@@ -0,0 +1,26 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize)]
+pub struct InstallQueryParams {
+    pub loaders: String,
+    pub game_versions: String,
+}
+
+#[derive(Deserialize)]
+pub struct InstallResult {
+    pub version_number: String,
+    pub files: Vec<InstallFile>,
+}
+
+#[derive(Deserialize)]
+pub struct InstallFile {
+    pub hashes: InstallHashes,
+    pub url: String,
+    pub filename: String,
+    pub size: u64,
+}
+
+#[derive(Deserialize)]
+pub struct InstallHashes {
+    pub sha512: String,
+}