bump crengine: more granular font weights (#7616)

Includes:
- MathML: a few minor fixes
- (Upstream) lvtext: fix possible index out of range
- Fonts: RegisterExternalFont() should take a documentId
- Fonts: fix: letter-spacing should not be applied on diacritic
- (Upstream) Fonts: more granular synthetic weights
- Fonts: synthesized weights: tweak some comments
- Fonts: keep hinting with synthetic weight
- Fonts: fix synthesized weight inconsitencies
- Fonts: fix getFontFileNameAndFaceIndex()
- Fonts: adds LVFontMan::RegularizeRegisteredFontsWeights()
- Fonts: handle synth_weight tweaks in glyph/glyphinfo slots
- (Upstream) Fonts: fix some compiler warnings
- Fix hyphenation on Armenian and Georgian text

Update the bottom menu widget "Font Weight" to allow more
granular weights than the previous "regular | bold".

Also bump thirdparty/luasec to v1.0.1.

frontend/document/credocument.lua

@@ -118,6 +118,14 @@ function CreDocument:engineInit()
                 end
             end
         end
+        -- Make sure registered fonts have a proper entry at weight 400 and 700 when
+        -- possible, to avoid having synthesized fonts for these normal and bold weights.
+        -- This allows restoring a bit of the previous behaviour of crengine when it
+        -- wasn't handling font styles, and associated for each typeface one single
+        -- font to regular (400) and one to bold (700).
+        -- It should ensure we use real fonts (and not synthesized ones) for normal text
+        -- and bold text with the font_base_weight setting set to its default value of 0 (=400).
+        cre.regularizeRegisteredFontsWeights(true) -- true to print what modifications were made
 
         engine_initialized = true
     end
@@ -1067,9 +1075,12 @@ function CreDocument:setInterlineSpacePercent(percent)
     self._document:setDefaultInterlineSpace(percent)
 end
 
-function CreDocument:toggleFontBolder(toggle)
-    logger.dbg("CreDocument: toggle font bolder", toggle)
-    self._document:setIntProperty("font.face.weight.embolden", toggle)
+function CreDocument:setFontBaseWeight(weight)
+    -- In frontend, we use: 0, 1, -0.5, a delta from the regular weight of 400.
+    -- crengine expects for these: 400, 500, 350
+    local cre_weight = math.floor(400 + weight*100)
+    logger.dbg("CreDocument: set font base weight", weight, "=", cre_weight)
+    self._document:setIntProperty("font.face.base.weight", cre_weight)
 end
 
 function CreDocument:getGammaLevel()