Atproto, types overhaul and error handling

Breaks off from Atrium-rs's types because they are implemented
inconsistently, which makes them harder to use.

This was done with reference to the atproto documentation but
specifically not the atrium-rs codebase so I wouldn't have to think
about licenses.

This adds the types and error module in atproto. It also touches
Cargo.toml for some new dependencies and some shared dependencies.

some things to keep in mind:
- There is no CID parsing
- None of this is tested, nor are there any tests written. We're playing
  fast and loose baby~

atproto/src/lib.rs

@@ -1,60 +1,3 @@
-use lazy_regex::regex_captures;
-use core::str::FromStr;
-
-pub use atrium_api::types::{
-  Collection,
-  string::{
-    Nsid,
-    RecordKey,
-    AtIdentifier as Authority,
-  }
-};
-
 pub mod lexicons;
-
-pub struct Uri {
-  whole: String,
-  // These fields could be useful in the future, 
-  // so I'm leaving the code for them.
-  // authority: Authority,
-  // collection: Option<Nsid>,
-  // rkey: Option<RecordKey>,
-}
-
-impl FromStr for Uri {
-  type Err = &'static str;
-  fn from_str(uri: &str) -> Result<Self, Self::Err> {
-    if uri.len() > 8000 {
-      return Err("Uri too long")
-    }
-
-    let Some((
-      whole, unchecked_authority, unchecked_collection, unchecked_rkey
-    )) = regex_captures!(
-      r"/^at:\/\/([\w\.\-_~:]+)(?:\/([\w\.\-_~:]+)(?:)\/([\w\.\-_~:]+))?$/i",
-      uri,
-    ) else { 
-      return Err("Invalid Uri"); 
-    };
-
-    // This parsing is required, but the values don't need to be used yet.
-    // No compute cost to use them, just storage cost
-    let _authority = Authority::from_str(unchecked_authority)?;
-
-    let _collection = if unchecked_collection.is_empty() { None }
-      else { Some(Nsid::new(unchecked_collection.to_string())?) };
-
-    let _rkey = if unchecked_rkey.is_empty() { None }
-      else { Some(RecordKey::new(unchecked_rkey.to_string())?) };
-
-    // Ok(Uri{ whole: whole.to_string(), authority, collection, rkey })
-    Ok(Uri { whole: whole.to_string() })
-  }
-}
-
-impl Uri {
-  pub fn as_str(&self) -> &str {
-    self.whole.as_str()
-  }
-}
-
+pub mod types;
+pub mod error;