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/pr/mod.rs

@@ -0,0 +1,84 @@
+// n34 - A CLI to interact with NIP-34 and other stuff related to codes in nostr
+// Copyright (C) 2025 Awiteb <a@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://gnu.org/licenses/gpl-3.0.html>.
+
+/// `pr apply` suubcommand
+mod apply;
+/// `pr close` subcommand
+mod close;
+/// `pr draft` subcommand
+mod draft;
+/// `pr list` subcommand
+mod list;
+/// `pr merge` subcommand
+mod merge;
+/// `pr new` subcommand
+mod new;
+/// `pr reopen` subcommand
+mod reopen;
+/// `pr update` subcommand
+mod update;
+/// `pr view` subcommand
+mod view;
+
+use clap::Subcommand;
+
+use self::apply::ApplyArgs;
+use self::close::CloseArgs;
+use self::draft::DraftArgs;
+use self::list::ListArgs;
+use self::merge::MergeArgs;
+use self::new::NewArgs;
+use self::reopen::ReopenArgs;
+use self::update::UpdateArgs;
+use self::view::ViewArgs;
+use crate::{
+    cli::{CliOptions, traits::CommandRunner},
+    error::N34Result,
+};
+
+/// The kind of the pull request
+pub const PR_KIND: nostr::event::Kind = nostr::event::Kind::Custom(1618);
+/// The kind of the pull request update
+pub const PR_UPDATE_KIND: nostr::event::Kind = nostr::event::Kind::Custom(1619);
+
+
+#[derive(Subcommand, Debug)]
+pub enum PrSubcommands {
+    /// Create a pull request.
+    New(NewArgs),
+    /// Update a pull request.
+    Update(UpdateArgs),
+    /// View a pull request.
+    View(ViewArgs),
+    /// List pull requests.
+    List(ListArgs),
+    /// Close a pull request.
+    Close(CloseArgs),
+    /// Convert to draft.
+    Draft(DraftArgs),
+    /// Reopen pull request.
+    Reopen(ReopenArgs),
+    /// Mark as applied.
+    Apply(ApplyArgs),
+    /// Merge a pull request.
+    Merge(MergeArgs),
+}
+
+impl CommandRunner for PrSubcommands {
+    async fn run(self, options: CliOptions) -> N34Result<()> {
+        crate::run_command!(self, options, & New Update View List Close Draft Reopen Apply Merge)
+    }
+}