Rename the project to Echo (was fedserv)

Rebrand the daemon and workspace: the binary is now `echo`, every crate
is `echo-*` (`echo-api` and the module crates), Rust imports use
`echo_*`, the gRPC proto is `proto/echo.proto` with package `echo.v1`,
and the log filter, gossip peer-name default, and on-disk store default
(`echo.db.jsonl`) follow. Docs updated throughout. No behaviour change;
crate directories and the config schema are untouched.

modules/groupserv/Cargo.toml

@@ -1,8 +1,8 @@
 [package]
-name = "fedserv-groupserv"
+name = "echo-groupserv"
 version = "0.0.1"
 edition = "2021"
 description = "GroupServ: user groups (!name) whose members can be granted channel access together."
 
 [dependencies]
-fedserv-api = { path = "../../api" }
+echo-api = { path = "../../api" }

modules/groupserv/src/add.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // ADD <!group> <account>: add a plain member (no flags). Needs founder or `f`.
 pub fn handle(me: &str, from: &Sender, name: Option<&str>, target: Option<&str>, ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/groupserv/src/del.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // DEL <!group> <account>: remove a member. Needs founder or the `f` flag.
 pub fn handle(me: &str, from: &Sender, name: Option<&str>, target: Option<&str>, ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/groupserv/src/drop.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // DROP <!group>: delete a group. Founder only.
 pub fn handle(me: &str, from: &Sender, name: Option<&str>, ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/groupserv/src/flags.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{apply_flags, Sender, ServiceCtx, Store, GROUP_FLAGS};
+use echo_api::{apply_flags, Sender, ServiceCtx, Store, GROUP_FLAGS};
 
 // FLAGS <!group> [account [+/-flags]]: list, show, or change group-access flags.
 // Listing/showing is open; changing needs the founder or the `f` flag.

modules/groupserv/src/info.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // INFO <!group>: show a group's founder and member count.
 pub fn handle(me: &str, from: &Sender, name: Option<&str>, ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/groupserv/src/lib.rs

@@ -8,7 +8,7 @@
 //! `lib.rs` holds the dispatcher and the two shared guards; each command lives
 //! in its own file.
 
-use fedserv_api::{NetView, Sender, Service, ServiceCtx, Store};
+use echo_api::{NetView, Sender, Service, ServiceCtx, Store};
 
 #[path = "register.rs"]
 mod register;
@@ -68,7 +68,7 @@ fn account<'a>(me: &str, from: &'a Sender, ctx: &mut ServiceCtx) -> Option<&'a s
 }
 
 // Whether `who` may manage `group` (founder, or holds the F/f flag).
-fn can_manage(group: &fedserv_api::GroupView, who: &str) -> bool {
+fn can_manage(group: &echo_api::GroupView, who: &str) -> bool {
     group.founder.eq_ignore_ascii_case(who)
         || group.members.iter().any(|m| m.account.eq_ignore_ascii_case(who) && (m.flags.contains('F') || m.flags.contains('f')))
 }

modules/groupserv/src/list.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // LIST: operators see every group; others see the ones they belong to.
 pub fn handle(me: &str, from: &Sender, ctx: &mut ServiceCtx, db: &mut dyn Store) {

modules/groupserv/src/register.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // REGISTER <!group>: create a group with you as its founder.
 pub fn handle(me: &str, from: &Sender, name: Option<&str>, ctx: &mut ServiceCtx, db: &mut dyn Store) {
@@ -14,7 +14,7 @@ pub fn handle(me: &str, from: &Sender, name: Option<&str>, ctx: &mut ServiceCtx,
     let acc = acc.to_string();
     match db.group_register(name, &acc) {
         Ok(()) => ctx.notice(me, from.uid, format!("Group \x02{name}\x02 registered — you're the founder.")),
-        Err(fedserv_api::ChanError::Exists) => ctx.notice(me, from.uid, format!("\x02{name}\x02 is already registered.")),
+        Err(echo_api::ChanError::Exists) => ctx.notice(me, from.uid, format!("\x02{name}\x02 is already registered.")),
         Err(_) => ctx.notice(me, from.uid, "Sorry, that didn't work. Please try again in a moment."),
     }
 }