Refactor Meilisearch, update to latest SDK, and implement faceted search (#44)

* feat(indexing): Reindex curseforge & local database at an interval

* fix(indexing): Use strings for meilisearch primary key

Fixes #17 by prefixing curseforge ids with "curse-" and local ids
with "local-".

* feat(indexing): Add newly created mods to the index more quickly

* feat(indexing): Implement faceted search, update to meilisearch master

Fixes #9, but only uses faceted search for categories.  It should
be reasonably simple to add support for versions, but it may not
be as useful due to the large number of versions and the large
number of supported versions for each mod.

* feat(indexing): Allow skipping initial indexing

Co-authored-by: Geometrically <18202329+Geometrically@users.noreply.github.com>

src/models/mods.rs

@@ -131,6 +131,10 @@ pub struct ModLoader(pub String);
 #[derive(Serialize, Deserialize)]
 pub struct SearchRequest {
     pub query: Option<String>,
+    /// Must match a json 2 deep array of strings `[["categories:misc"]]`
+    // TODO: We may want to have a better representation of this, so that
+    // we are less likely to break backwards compatability
+    pub facets: Option<String>,
     pub filters: Option<String>,
     pub version: Option<String>,
     pub offset: Option<String>,