Added info about optimizing EPUB.

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? no

Added info about optimizing EPUB.

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? no

Added info about optimizing EPUB.

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? no

…king-space

* master:
  fix: Reduce MIN_SIZE_FOR_POPUP to 10KB (crosspoint-reader#809)
  docs: Update USER_GUIDE.md (crosspoint-reader#817)
  fix: Prevent sleeping when in OPDS browser / downloading books (crosspoint-reader#818)
  feat: Extend python debugging monitor functionality (keyword filter / suppress) (crosspoint-reader#810)
  docs: Update USER_GUIDE.md (crosspoint-reader#808)
  feat: Connect to last wifi by default (crosspoint-reader#752)

* master: (25 commits)
  fix: Reduce MIN_SIZE_FOR_POPUP to 10KB (crosspoint-reader#809)
  docs: Update USER_GUIDE.md (crosspoint-reader#817)
  fix: Prevent sleeping when in OPDS browser / downloading books (crosspoint-reader#818)
  feat: Extend python debugging monitor functionality (keyword filter / suppress) (crosspoint-reader#810)
  docs: Update USER_GUIDE.md (crosspoint-reader#808)
  feat: Connect to last wifi by default (crosspoint-reader#752)
  feat: use natural sort in file browser (crosspoint-reader#722)
  fix: issue if book href are absolute url and not relative to server (crosspoint-reader#741)
  feat: unify navigation handling with system-wide continuous navigation (crosspoint-reader#600)
  feat: Add Italian hyphenation support (crosspoint-reader#584)
  feat: Add percentage support to CSS properties (crosspoint-reader#738)
  Use GITHUB_REF_NAME over GITHUB_HEAD_REF in release candidate workflow
  Move release candidate workflow to manual dispatch
  fix: Allow OTA update from RC build to full release (crosspoint-reader#778)
  refactor: Rename "Embedded Style" to "Book's Embedded Style" (crosspoint-reader#746)
  perf: optimize drawPixel() (crosspoint-reader#748)
  feat: wakeup target detection (crosspoint-reader#731)
  fix: Scrolling page items calculation (crosspoint-reader#716)
  feat: optimize fillRectDither (crosspoint-reader#737)
  fix: increase lyra sideButtonHintsWidth to 30 (crosspoint-reader#727)
  ...