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/botserv/src/assign.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Priv, Sender, ServiceCtx, Store};
+use echo_api::{Priv, Sender, ServiceCtx, Store};
 
 // ASSIGN <#channel> <bot> / UNASSIGN <#channel>: put a bot in a channel (or take
 // it out). Channel founder only (or a services admin).

modules/botserv/src/badwords.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{ChanError, Sender, ServiceCtx, Store};
+use echo_api::{ChanError, Sender, ServiceCtx, Store};
 
 // BADWORDS <#channel> ADD <regex> | DEL <regex> | LIST | CLEAR: manage the
 // channel's badword patterns. Each entry is a regular expression, so a channel

modules/botserv/src/bot.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{ChanError, Priv, Sender, ServiceCtx, Store};
+use echo_api::{ChanError, Priv, Sender, ServiceCtx, Store};
 
 // BOT ADD <nick> <user> <host> [gecos] | BOT DEL <nick> | BOT LIST — manage the
 // bot registry. Administering bots is oper-only (Priv::Admin).

modules/botserv/src/copy.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // COPY <#source> <#dest>: copy a channel's bot configuration — kickers,
 // badwords, greet and nobot — onto another. Requires founder-or-admin on both.

modules/botserv/src/info.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Sender, ServiceCtx, Store};
+use echo_api::{Sender, ServiceCtx, Store};
 
 // INFO <bot> — describe a bot and list the channels it serves.
 // INFO <#channel> — show which bot (if any) is assigned to a channel.

modules/botserv/src/kick.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{Kicker, Sender, ServiceCtx, Store};
+use echo_api::{Kicker, Sender, ServiceCtx, Store};
 
 // KICK <#channel> <type> {ON|OFF} [params]: configure the bot's kickers.
 // Types: CAPS [min [percent]], BOLDS, COLORS, UNDERLINES, REVERSES, ITALICS,

modules/botserv/src/lib.rs

@@ -2,7 +2,7 @@
 //! and (in later slices) run fantasy commands. `lib.rs` holds the dispatcher;
 //! each command lives in its own file, matching NickServ/ChanServ.
 
-use fedserv_api::{NetView, Priv, Sender, Service, ServiceCtx, Store};
+use echo_api::{NetView, Priv, Sender, Service, ServiceCtx, Store};
 
 #[path = "bot.rs"]
 mod bot;

modules/botserv/src/say.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{NetView, Priv, Sender, ServiceCtx, Store};
+use echo_api::{NetView, Priv, Sender, ServiceCtx, Store};
 
 // SAY <#channel> <text> — make the channel's assigned bot say something.
 // ACT <#channel> <text> — the same, as a CTCP ACTION (/me).

modules/botserv/src/set.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{parse_duration, ChanSetting, Priv, Sender, ServiceCtx, Store};
+use echo_api::{parse_duration, ChanSetting, Priv, Sender, ServiceCtx, Store};
 
 // SET <#channel> <option> <value>: per-channel bot options (founder-or-admin) —
 // GREET <on|off>, BANEXPIRE <duration|off>, NOBOT <on|off>. Also

modules/botserv/src/trigger.rs

@@ -1,4 +1,4 @@
-use fedserv_api::{ChanError, Sender, ServiceCtx, Store};
+use echo_api::{ChanError, Sender, ServiceCtx, Store};
 
 // TRIGGER <#channel> ADD <regex>|<response> | DEL <num> | LIST | CLEAR: manage
 // the channel's auto-responses. When a line matches <regex>, the assigned bot