feat(welcome): message de bienvenue simple, sans bouton ni tour

Retire le bouton « J'y vais mais j'ai peur » (qui ne lançait aucun tour
fonctionnel) et toute la machinerie du tour d'initiation (WelcomeTour,
CreateActorDialog) devenus inutiles. tour.mjs ne garde que
postWelcomeMessage() ; les clés i18n TOURS.Welcome.* sont supprimées.

lang/en.json

@@ -65,23 +65,7 @@
     "roll_dice": "Roll the dice"
   },
   "TOURS": {
-    "ChatMessage": "<h3>Welcome to Vermine 2047!</h3><p>If you're using this system for the first time, our shaman will guide you to your initiation rite</p> <button id=\"vermine-tour-chat-button\"> <i class=\"fas fa-person-hiking\"></i> I'm going but I'm scared </button><hr><p class=\"vermine-credits\"><strong>Vermine 2047</strong> — a game by Julien Blondel<br>© 2023 Studio Agate — TOTEM System — © 2023 Julien Blondel — All rights reserved.<br>Foundry VTT system developed by <a href=\"https://www.uberwald.me\">LeRatierBretonnier</a>, based on an original work by RWanoux.</p>",
-    "Welcome": {
-      "Title": "Welcome to Vermine",
-      "Description": "Overview of the Vermine system",
-      "WelcomeTitle": "Welcome",
-      "WelcomeContent": "<p>Welcome to Vermine, survivor! Take a tour of our action zone to find your bearings, even if it's your first day among us.</p><p>At the top of the right column, you have everything you're allowed to do here: talk, see other tronches of your commu, manage your matos and that of your potes, study the maps, read the journals of the clamsés, go get us some food with your surin. Let's get into the thick of it.</p>",
-      "ActorTabTitle": "Populate your universe",
-      "ActorTabContent": "<p>Well installed, survivor? Let's not turn around the pot, if you want to stay with us, you'll have to tell us who you are, where you come from, and who you trust. Once you're ready for that, click on the \"Create an actor\" button</p>",
-      "CharacterCreateTitle": "Create a group",
-      "CharacterCreateContent": "<p>This button creates a group file, because that's where we start, in this trou! Your tronche will come later, when you create your character file. As you progress, you might want to add some info on what you see around the camp.</p>",
-      "CompendiumTitle": "Maps",
-      "CompendiumContent": "<p>You will probably need a map of the Iron Lands or a sector of the Forge. You can create your own scene for that, or you can use one of ours. Open one of these compendiums and drag a map into your scene tab (the tab that looks like a folded map).</p>",
-      "OracleToolTitle": "Totem",
-      "OracleToolContent": "<p>No game of Vermine or Starforged would be complete without oracles. This button will open a window with all the oracles of the chosen game. The oracles are also available from the character sheet.</p>",
-      "ToursTitle": "Next steps",
-      "ToursContent": "<p>You're not doing too badly! I'll leave you there, but if you have any questions, you can come find me. If it's about the mechanics, sign up for our group of speech, over there <a href=\"https://discord.gg/FqGHYvXg\">Totem Foundry Discord</a>. Otherwise, you can join the central place over here <a href=\"https://discord.gg/qejqmSxr\">Vermine Discord</a></p><p>Enjoy!</p>"
-    }
+    "ChatMessage": "<h3>Welcome to Vermine 2047!</h3><p>If you're using this system for the first time, our shaman will guide you to your initiation rite</p><hr><p class=\"vermine-credits\"><strong>Vermine 2047</strong> — a game by Julien Blondel<br>© 2023 Studio Agate — TOTEM System — © 2023 Julien Blondel — All rights reserved.<br>Foundry VTT system developed by <a href=\"https://www.uberwald.me\">LeRatierBretonnier</a>, based on an original work by RWanoux.</p>"
   },
   "DIFFICULTY_LEVELS": {
     "obvious": "Obvious",