feat: Panorama skill HUD and menu, CSS 1.0.375

- Skill card and W/S/E target menu drawn as CCSCustomHudLayout panels via PanoramaManager
  (panorama/ sources), replacing PrintToCenterHtml and WASDMenuAPI; WASDMenuAPI.dll dropped
- Custom status lines (cooldowns, charges) overwrite the description on the card; Medic keeps its
  description with the charge count below
- css_setoverride toggles a per-player cooldown bypass
- YourSkillChatInfo also gates the round-start skill description in chat
- Language: "[css_useSkill]" becomes the configured button name, "Press ... key" wording,
  welcome message trimmed to its first line
- Build against CounterStrikeSharp.API 1.0.375

jRandomSkills - SRC Files/panorama/layout/custom_game/skill_hud.xml

@@ -0,0 +1,31 @@
+<root>
+	<styles>
+		<include src="s2r://panorama/styles/gamestyles.vcss_c" />
+		<include src="s2r://panorama/styles/custom_game/skill_hud.vcss_c" />
+	</styles>
+
+	<!--
+		Stage 1 of the jRandomSkills HUD replacement (see CLAUDE.md's "Panorama HUD" section) - a
+		real CCSCustomHudLayout panel driving Event.UpdateSkillHUD in PlayerEvents.cs, for the ~119
+		skills that don't set a custom PrintHTML override. The 36 skills that do (custom bars/
+		cooldown visuals) still go through the original PrintToCenterHtml path untouched - that's
+		stage 2, not built yet.
+
+		Real per-skill hex colors (from skillsInfo.json) can't be sent here - the server can only
+		toggle a class, never a color value. skill_hud.css defines 5 rarity classes instead
+		(rarity-common..rarity-legendary), and PlayerEvents.cs picks one from the skill's own
+		configured Rarity.
+
+		No captured mouse, no row pool - this is a passive always-on display, same shape as
+		PanoramaHudDemo's panel_demo.xml. Same structural rules: root has no id (compiler-assigned),
+		authored hidden, PanoramaManager toggles it per player.
+	-->
+	<Panel class="skillhud-viewport" hittest="false">
+		<Panel id="SkillHudRoot" class="skillhud-root hidden" hittest="false">
+			<Panel id="skillhud_card" class="skillhud-card">
+				<Label id="skillhud_skill" class="skillhud-skill" text="{s:hud_skill}" />
+				<Label id="skillhud_extra" class="skillhud-extra" text="{s:hud_extra}" />
+			</Panel>
+		</Panel>
+	</Panel>
+</root>