Fix/ghcup 0.1.0

[PhotonQuantum]

Tested on schema version 0.1.0

[definfo]

LGTM, except that mod.rs comments might mention GhcupYaml usage.

[PhotonQuantum]

For now I don't see any GhcupYaml mention that's outdated

⊢  rg "GhcupYaml"
src/ghcup/yaml.rs
18:pub struct GhcupYaml {
24:impl GhcupYaml {
31:        GhcupYaml {
40:impl SnapshotStorage<SnapshotMeta> for GhcupYaml {
93:impl SourceStorage<SnapshotMeta, TransferURL> for GhcupYaml {

src/ghcup/mod.rs
24:use crate::ghcup::yaml::GhcupYaml;
73:    pub fn get_yaml(&self, legacy: bool) -> GhcupYaml {
74:        GhcupYaml::new(self.ghcup_repo_config.clone(), legacy)