Rename app from chat to neoirc, binary to neoircd (closes #46)

- Rename Go module path: git.eeqj.de/sneak/chat -> git.eeqj.de/sneak/neoirc
- Rename binary: chatd -> neoircd, chat-cli -> neoirc-cli
- Rename cmd directories: cmd/chatd -> cmd/neoircd, cmd/chat-cli -> cmd/neoirc-cli
- Rename Go package: chatapi -> neoircapi
- Update Makefile: binary name, build targets, docker image tag, clean target
- Update Dockerfile: binary paths, user/group names, ENTRYPOINT
- Update .gitignore and .dockerignore
- Update all Go imports and doc comments
- Update default server name fallback: chat -> neoirc
- Update web client: localStorage keys, page title, default server name
- Update all schema $id URLs and example hostnames
- Update README.md: project name, binary references, examples, directory tree
- Update AGENTS.md: build command reference
- Update test fixtures: app name and channel names

cmd/neoircd/main.go

@@ -0,0 +1,41 @@
+// Package main is the entry point for the neoircd server.
+package main
+
+import (
+	"git.eeqj.de/sneak/neoirc/internal/config"
+	"git.eeqj.de/sneak/neoirc/internal/db"
+	"git.eeqj.de/sneak/neoirc/internal/globals"
+	"git.eeqj.de/sneak/neoirc/internal/handlers"
+	"git.eeqj.de/sneak/neoirc/internal/healthcheck"
+	"git.eeqj.de/sneak/neoirc/internal/logger"
+	"git.eeqj.de/sneak/neoirc/internal/middleware"
+	"git.eeqj.de/sneak/neoirc/internal/server"
+	"go.uber.org/fx"
+)
+
+var (
+	// Appname is the application name, set at build time.
+	Appname = "neoirc" //nolint:gochecknoglobals
+
+	// Version is the application version, set at build time.
+	Version string //nolint:gochecknoglobals
+)
+
+func main() {
+	globals.Appname = Appname
+	globals.Version = Version
+
+	fx.New(
+		fx.Provide(
+			config.New,
+			db.New,
+			globals.New,
+			handlers.New,
+			logger.New,
+			server.New,
+			middleware.New,
+			healthcheck.New,
+		),
+		fx.Invoke(func(*server.Server) {}),
+	).Run()
+}