String settings hooks (#82)

* added theme; env change

* began refactoring

* added process hook

* now singular string for each hook

* fixed splitting by comma to by space

* profile_create function updated

* prettier

* added jre validator

* restructured so that it doesnt look like a vec

* fixed merge issue

* snake case

* resolved merge issues + added process events

* clippy, fmt

* removed unnecssary func

theseus_gui/src-tauri/src/api/mod.rs

@@ -33,6 +33,9 @@ pub enum TheseusSerializableError {
 
     #[error("No profile found at {0}")]
     NoProfileFound(String),
+
+    #[error("Improperly formatted environment variables: {0}")]
+    BadEnvVars(String),
 }
 
 // Generic implementation of From<T> for ErrorTypeA
@@ -74,4 +77,5 @@ impl_serialize! {
     Theseus,
     IO,
     NoProfileFound,
+    BadEnvVars,
 }