feat: nuevo logo/icono de la app y favicon

Icono derivado del original de LinkedCorp (circulo azul #1C55FF, red de
nodos) con una insignia en el acento de la app (#0078D4) para identificar
el modulo de Proyectos. Actualiza logoLinked1.png, logoLinkedCorpTxt.png
y logoLinkedCorpTxtBlack.png (sidebar y login, temas oscuro/claro) y
agrega favicon.svg/png + apple-touch-icon.png (antes no habia favicon).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/index.html

@@ -3,6 +3,9 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <link rel="alternate icon" href="/favicon.png" />
+    <link rel="apple-touch-icon" href="/apple-touch-icon.png" />
     <title>project.linkedcorp.net</title>
   </head>
   <body>

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "project-linkedcorp-frontend",
   "private": true,
-  "version": "1.6.0",
+  "version": "1.6.1",
   "type": "module",
   "scripts": {
     "dev": "vite",

frontend/public/favicon.svg

@@ -0,0 +1,14 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+  <circle cx="50" cy="50" r="48" fill="#1C55FF"/>
+  <circle cx="50" cy="50" r="37" fill="none" stroke="#FFFFFF" stroke-width="3.4"/>
+  <polyline points="36,32 36,15 61,15 75,26" fill="none" stroke="#FFFFFF" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <circle cx="75" cy="26" r="3.4" fill="#FFFFFF"/>
+  <polyline points="45,41 52,41 52,55 58,55" fill="none" stroke="#FFFFFF" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <polyline points="73,55 88,55" fill="none" stroke="#FFFFFF" stroke-width="3.2" stroke-linecap="round"/>
+  <polyline points="58,60 47,60 47,64" fill="none" stroke="#FFFFFF" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <polyline points="38,73 24,73 15,83" fill="none" stroke="#FFFFFF" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <circle cx="15" cy="83" r="3.4" fill="#FFFFFF"/>
+  <rect x="27" y="32" width="18" height="18" rx="1.6" fill="#1C55FF" stroke="#FFFFFF" stroke-width="3.2"/>
+  <rect x="58" y="48" width="15" height="15" rx="1.4" fill="#1C55FF" stroke="#FFFFFF" stroke-width="3.2"/>
+  <rect x="38" y="64" width="18" height="18" rx="1.6" fill="#1C55FF" stroke="#FFFFFF" stroke-width="3.2"/>
+</svg>