feat: support pull requests

Support for pull requests, it's not standard in NIPs yet[1] but there must be
two clients that support it to be included in NIPs, n34 is one of them.

This support:
- Create a new PR `n34 pr new`
- Update PR tip `n34 pr update`
- View a PR `n34 pr view`
- List PRs `n34 pr list`
- Add `PR` and `PR-update` kinds as roots in `NostrClient::find_root`
- Support issuing statuses for PRs
- Support GRASP PR and PR-update
- Update the docs

[1] https://github.com/nostr-protocol/nips/pull/1966

src/cli/commands/mod.rs

@@ -20,6 +20,8 @@ pub mod config;
 pub mod issue;
 /// `patch` subcommands
 pub mod patch;
+/// `pr` subcommands
+pub mod pr;
 /// `reply` command
 pub mod reply;
 /// `repo` subcommands
@@ -40,6 +42,7 @@ use nostr_connect::client::NostrConnect;
 use self::config::ConfigSubcommands;
 use self::issue::IssueSubcommands;
 use self::patch::PatchSubcommands;
+use self::pr::PrSubcommands;
 use self::reply::ReplyArgs;
 use self::repo::RepoSubcommands;
 use self::sets::SetsSubcommands;
@@ -113,6 +116,11 @@ pub enum Commands {
         #[command(subcommand)]
         subcommands: PatchSubcommands,
     },
+    /// Manage pull requests
+    Pr {
+        #[command(subcommand)]
+        subcommands: PrSubcommands,
+    },
     /// Manage configuration
     Config {
         #[command(subcommand)]
@@ -197,6 +205,6 @@ impl CommandRunner for Commands {
         tracing::trace!("Options: {options:#?}");
         tracing::trace!("Handling: {self:#?}");
 
-        crate::run_command!(self, options, Repo Issue Sets Patch Config & Reply)
+        crate::run_command!(self, options, Repo Issue Sets Patch Pr Config & Reply)
     }
 }