Initial scaffold: Nakama backend, Godot client, content schema

Sets up the Step 1 (Project Foundation) and Step 2 (Content Schemas) scaffold
from the implementation sequence. Includes Docker Compose stack, Nakama
TypeScript module stubs, PostgreSQL migration, Godot 4 project shell with
scene stubs and NakamaClient singleton, YAML content schemas for all entity
types, and example data for 3 characters, 2 jobs, and all 7 core resources.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

content/data/resources/core_resources.yaml

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+# core_resources.yaml — definitions for all seven core economy resources
+# These are the definite resource set from the concept specification.
+
+---
+$schema: "xyvera/content-schema/resource/v1"
+id: gold
+name: "Gold"
+description: "General-purpose soft currency earned from trade, jobs, and combat rewards."
+category: soft_currency
+is_spendable: true
+is_capped: false
+icon: "icons/resources/gold.png"
+color_hex: "#F4C542"
+sources:
+  - "Village jobs with gold output"
+  - "Combat stage clear rewards"
+  - "Event milestone rewards"
+  - "Selling excess items"
+sinks:
+  - "Character level-up costs"
+  - "Skill upgrade costs"
+  - "Building upgrades"
+  - "Shop purchases"
+
+---
+$schema: "xyvera/content-schema/resource/v1"
+id: wood
+name: "Wood"
+description: >
+  Primary construction material. The early bottleneck resource.
+  Assign lumberjacks to the Lumber Camp for passive gain, or use the
+  manual work action for burst output.
+category: soft_currency
+is_spendable: true
+is_capped: true
+carry_cap: 9999
+icon: "icons/resources/wood.png"
+color_hex: "#8B5E3C"
+sources:
+  - "Lumber Camp passive output"
+  - "Manual wood-chopping action (burst yield, daily cap applies)"
+  - "Event rewards"
+sinks:
+  - "Building construction and upgrades"
+  - "Character ascension material crafting"
+  - "Equipment crafting (deferred)"
+
+---
+$schema: "xyvera/content-schema/resource/v1"
+id: stone
+name: "Stone"
+description: "Durable building material mined from rocky outcroppings."
+category: soft_currency
+is_spendable: true
+is_capped: true
+carry_cap: 9999
+icon: "icons/resources/stone.png"
+color_hex: "#9E9E9E"
+sources:
+  - "Mining Site passive output"
+  - "Event rewards"
+sinks:
+  - "Advanced building upgrades"
+  - "Ascension material crafting"
+
+---
+$schema: "xyvera/content-schema/resource/v1"
+id: knowledge
+name: "Knowledge"
+description: >
+  Accumulated learning that fuels skill upgrades and research improvements.
+  The second scarcity axis after wood — players must balance knowledge
+  spending between skill upgrades and building research.
+category: knowledge
+is_spendable: true
+is_capped: true
+carry_cap: 5000
+icon: "icons/resources/knowledge.png"
+color_hex: "#7B68EE"
+sources:
+  - "Research Post passive output"
+  - "Combat passive skill (Sable's Field Notes)"
+  - "Event milestone rewards"
+sinks:
+  - "Character skill upgrades"
+  - "Building research"
+  - "Expedition unlocks (deferred)"
+
+---
+$schema: "xyvera/content-schema/resource/v1"
+id: experience
+name: "Experience"
+description: "Character growth material gained from combat, jobs, and events."
+category: soft_currency
+is_spendable: true
+is_capped: false
+icon: "icons/resources/experience.png"
+color_hex: "#4CAF50"
+sources:
+  - "Combat stage completion"
+  - "Research Post secondary output"
+  - "Assignment mastery milestone rewards"
+sinks:
+  - "Character level-up (primary cost alongside gold)"
+
+---
+$schema: "xyvera/content-schema/resource/v1"
+id: mana
+name: "Mana"
+description: >
+  Ambient magical energy. Consumed by the manual work action and some
+  skill activations. Regenerates slowly over time.
+category: stamina
+is_spendable: true
+is_capped: true
+carry_cap: 200
+icon: "icons/resources/mana.png"
+color_hex: "#29B6F6"
+sources:
+  - "Passive regen (5 mana per hour)"
+  - "Event rewards"
+  - "Diamond purchase (deferred — monetisation not active in PoC)"
+sinks:
+  - "Manual work action (5 mana per use)"
+  - "Future expedition actions (deferred)"
+
+---
+$schema: "xyvera/content-schema/resource/v1"
+id: diamond
+name: "Diamond"
+description: >
+  Premium hard currency. Obtainable free-to-play through events, milestones,
+  and logins. Can also be purchased. Used primarily for gacha pulls.
+  Spending should never be required for core progression per the F2P spec.
+category: premium
+is_spendable: true
+is_capped: false
+icon: "icons/resources/diamond.png"
+color_hex: "#00E5FF"
+sources:
+  - "New account seed grant (100)"
+  - "Event milestone rewards"
+  - "Achievement unlocks"
+  - "Login streak bonuses"
+  - "Purchase (deferred — monetisation not active in PoC)"
+sinks:
+  - "Standard banner pulls (cost TBD per banner definition)"
+  - "Featured banner pulls"
+  - "Shop convenience purchases (deferred)"