v0.12: A bit beginner-friendlier

This is a small update intended to address player feedback and make the game more digestible for the first-time players.
Until first completion of stage 8, new player now has access to only 40 cards and 70 items, which hopefully reduces cognitive load.

Minor gameplay changes:

• Added 'fatigue' encounter effect
• Encounter effect 'upgraded' is now unlocked earlier to facilitate unlocking card upgrades
• More cards and items are locked behind achievements
•  Added new 'Intro' achievement to simplify early meta-game for new players

Minor UI changes:

• Clarified some card descriptions
• Multi-line effect descriptions are now indented to separate them better
• Improved achievements highlighting

New items (1):

• Ice Cream

Balance:

• Buffed cards: Heavy Blow
• Nerfed monsters: Deep One

Selected bugfixes:

• Fix some typos in tutorial
• Tutorial window is now correctly draggable in Chrome
• Prevent tutorial soft-lock when user plays cards prematurely
• Do not offer encounter effects which use locked mechanics
• Additional card rewards no longer offer locked cards
• Fix crash on encountering Deepest One monster before unlocking it
• Fix Goblin Bomber adding locked card to player's hand
• 'Frozen Peak' quests are now correctly limited to 'frozen' terrain