fix(font): bundled font now actually renders, ship Inter Light, +CJK fallback

Plugin.cs:937 only pushed RegularFont when Config.FontsEnabled was true.
  FontsAndColours.cs:50 forces FontsEnabled=false whenever UseHellionFont is
  enabled (to hide the chooser UI), so the bundled-font path was silently
  dead and the FFXIV Axis game-font took over. Exo 2 looked "almost right"
  because it overlaps Axis on basic Latin, so the regression went unnoticed
  for the entire v1.5.x series.

  The fix routes RegularFont through draw whenever either FontsEnabled or
  UseHellionFont is on. First-frame HITCH dropped from ~74 ms to ~20 ms
  median (5-reload Linux/Wine sample 17.9-23.6 ms) as a side effect — the
  v1.5.1 "too optimistic" defer-pattern hypothesis was actually a symptom
  of this bug, not bad math.

  Font-stack overhaul on top:
  - Inter Light (Static 18pt-Light, 343 KB, SIL OFL 1.1) replaces Exo 2 as
    the bundled font. Inter ships full Latin Extended-A/B, Greek polytonic
    and Cyrillic Supplement coverage.
  - NotoSansCjkRegular added as a third merge layer for Hangul,
    Simplified-Chinese-specific Han glyphs, and CJK fallbacks the FFXIV
    Japanese font does not ship.
  - Two new ExtraGlyphRanges flags (LatinExtended, Greek) implemented via
    AddChar pair lists in SetUpRanges.
  - Settings.Apply auto-activates the matching ExtraGlyphRanges flag on
    language change. Plugin.LoadAsync runs a one-shot migration that ORs
    in the required flag for an already-selected language.
  - ExtraGlyphRanges CollapsingHeader reachable regardless of
    UseHellionFont (was hidden in the early-return branch).
  - New WarningText below the language combo: FFXIV's chat engine only
    fully supports EN/DE/FR/JA. Other scripts render in the HellionChat
    UI but may garble in in-game chat input/send.

  Localisation wave (originally a FR-only cycle):
  - 24 selectable UI languages. LanguageOverride enum gains 10 new locales
    plus 3 previously commented-out (Italian, Korean, Norwegian with ISO
    code `nb` instead of `no`). All new values append to keep existing
    user-config integer serialisation stable.
  - Resource bundle split: HellionStrings.resx (24 locales, 328 keys) for
    fork-added strings, Language.resx (24 locales, 456 keys) for the
    ChatTwo-Crowdin-heritage. 4 post-sync Crowdin keys backfilled into
    13 legacy locales with per-key AI-assisted comment marker.
  - Em-dash sweep on EN source plus 18 translations. Russian and Ukrainian
    keep their typographic norm.

  Old HellionFont.ttf + HellionFont-OFL.txt removed; Inter-Light.ttf +
  Inter-OFL.txt take their place. Configuration field UseHellionFont keeps
  its name for backwards-compat. Migration v17 stays.

HellionChat/Resources/HellionStrings.sv.resx

@@ -385,10 +385,10 @@
     <value>Hur ogenomskinliga pluginfönstren är. Lägre värden låter spelet synas igenom. Formulärfält och dialoger förblir helt ogenomskinliga och läsbara överst.</value>
   </data>
   <data name="Theme_UseHellionFont_Name" xml:space="preserve">
-    <value>Använd medföljande Hellion-teckensnitt (Exo 2)</value>
+    <value>Använd inbäddat Inter Light</value>
   </data>
   <data name="Theme_UseHellionFont_Description" xml:space="preserve">
-    <value>Renderar chatt och gränssnitt i Exo 2 (SIL Open Font License 1.1), som medföljer pluginen. Inaktivera för att återgå till teckensnittet valt under Inställningar → Teckensnitt.</value>
+    <value>Renderar chatt och UI i Inter Light (SIL Open Font License 1.1), som följer med pluginet. Inaktivera för att återgå till typsnittet som valts i Inställningar → Typsnitt.</value>
   </data>
 
   <data name="About_Maintainer_Heading" xml:space="preserve">
@@ -1030,4 +1030,8 @@
   <data name="DbViewer_FullTextToggle_Hint_PhraseMode" xml:space="preserve">
     <value>Söker efter den exakta frasen. Flerdordsfrågor matchar bara när orden förekommer tillsammans i ordning. Om du vill använda rå FTS5 MATCH-syntax, omge din term med dubbla citattecken själv.</value>
   </data>
+  <data name="Settings_Language_FFXIVCoverage_Warning" xml:space="preserve">
+    <value>HellionChat visar alla 24 språk, men FFXIV:s chattinmatning stödjer endast EN, DE, FR och JA fullt ut. Andra skriftsystem kan visas som förvrängda tecken när de skrivs i spelets chatt eller skickas som meddelanden.</value>
+    <comment>AI-assisted machine translation. Pending native-speaker review.</comment>
+  </data>
 </root>