Strip comments from backend and frontend source

Remove Go doc comments, TS/Svelte scaffold comments and explanatory
notes left over from the initial scaffold, plus a few leftover Spanish
notes in the compose file, SQL scripts and env template. Also drops
frontend/src/lib/index.ts, which only held the SvelteKit placeholder
comment and was never imported.

backend/internal/httpserver/router.go

@@ -1,4 +1,3 @@
-// Package httpserver contiene el router HTTP y los handlers de la API.
 package httpserver
 
 import (
@@ -13,14 +12,12 @@ import (
 	dockerconn "dockermanager/backend/internal/docker"
 )
 
-// Deps son las dependencias que necesitan los handlers.
 type Deps struct {
 	Logger  *slog.Logger
 	Docker  dockerconn.HostConnector
 	Origins []string
 }
 
-// NewRouter construye el router HTTP con todas las rutas de la Fase 1.
 func NewRouter(deps Deps) http.Handler {
 	r := chi.NewRouter()
 
@@ -47,7 +44,6 @@ func NewRouter(deps Deps) http.Handler {
 	return r
 }
 
-// slogRequestLogger es un middleware mínimo que registra cada request con slog.
 func slogRequestLogger(logger *slog.Logger) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {