feat(proxy): integrate rad/self

[FintanH]

Depends on radicle-dev/radicle-link#229

Fixes #576
Closes #548

This integrates the use of rad/self in the monorepo. This means when we create an identity, we set the default rad/self in the peer to that User.

We can now filter the projects by the rad/self of the Project is the same as the default rad/self. This is demonstrated in test_list_projects

[xla]

🚇 🎊 🎋 🕹

[rudolfs]

Looks great!

Inlined some suggestions.

Would also suggest to apply this patch:

diff --git a/ui/Screen/IdentityCreation.svelte b/ui/Screen/IdentityCreation.svelte
index fc3f077..cfc13b4 100644
--- a/ui/Screen/IdentityCreation.svelte
+++ b/ui/Screen/IdentityCreation.svelte
@@ -16,9 +16,20 @@
     store.set(State.Welcome);
   };

+  const truncateUrn = message => {
+    let urn = message.match(/(rad:git:\w{59})/)[1];
+
+    if (urn) {
+      return message.replace(/(rad:git:\w{59})/, urn.substr(-5));
+    } else {
+      return message;
+    }
+  };
+
   const onError = event => {
-    notification.error(`Could not create identity: ${event.detail}`);
-    pop();
+    notification.error(
+      `Could not create identity: ${truncateUrn(event.detail.message)}`
+    );
   };

   const complete = redirectPath => {
diff --git a/ui/Screen/IdentityCreation/Form.svelte b/ui/Screen/IdentityCreation/Form.svelte
index bb6d1e0..b014c41 100644
--- a/ui/Screen/IdentityCreation/Form.svelte
+++ b/ui/Screen/IdentityCreation/Form.svelte
@@ -63,7 +63,7 @@
   $: if ($store.status === remote.Status.Success) {
     dispatch("success");
   } else if ($store.status === remote.Status.Error) {
-    dispatch("error");
+    dispatch("error", {message: $store.error.message});
   }
 </script>

Before (the pop() sometimes causes the error to not show up):

After:

[rudolfs]

lol