feat: dict based Hyphenation (#305)

## Summary

* Adds (optional) Hyphenation for English, French, German, Russian
languages

## Additional Context

* Included hyphenation dictionaries add approximately 280kb to the flash
usage (German alone takes 200kb)
* Trie encoded dictionaries are adopted from hypher project
(https://github.com/typst/hypher)
* Soft hyphens (and other explicit hyphens) take precedence over
dict-based hyphenation. Overall, the hyphenation rules are quite
aggressive, as I believe it makes more sense on our smaller screen.

---------

Co-authored-by: Dave Allie <dave@daveallie.com>

lib/Epub/Epub/hyphenation/Hyphenator.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <cstddef>
+#include <string>
+#include <vector>
+
+class LanguageHyphenator;
+
+class Hyphenator {
+ public:
+  struct BreakInfo {
+    size_t byteOffset;
+    bool requiresInsertedHyphen;
+  };
+  // Returns byte offsets where the word may be hyphenated. When includeFallback is true, all positions obeying the
+  // minimum prefix/suffix constraints are returned even if no language-specific rule matches.
+  static std::vector<BreakInfo> breakOffsets(const std::string& word, bool includeFallback);
+
+  // Provide a publication-level language hint (e.g. "en", "en-US", "ru") used to select hyphenation rules.
+  static void setPreferredLanguage(const std::string& lang);
+
+ private:
+  static const LanguageHyphenator* cachedHyphenator_;
+};