✨Feature: add character creation logic and tests

- Implement character creation functions to handle adventurer setup.
- Add validation for adventurer name and selection of starting items.
- Introduce new items in sample content pack: Flint and Steel, Pouch, Wax Sealing Kit, and Backpack.
- Create tests for character creation functionality to ensure valid options and error handling.

✨Feature: implement dice rolling mechanics and tests

- Add functions for rolling various dice types (d3, d6, 2d6, d66) with validation.
- Implement modifier application with clamping for roll results.
- Create tests to verify correct behavior of dice rolling functions.

✨Feature: add table lookup functionality and tests

- Implement table lookup and resolution logic for defined tables.
- Support for modified ranges and fallback to nearest entries.
- Create tests to ensure correct table entry resolution based on roll results.

src/rules/character.test.ts

@@ -0,0 +1,50 @@
+import { describe, expect, it } from "vitest";
+
+import { sampleContentPack } from "@/data/sampleContentPack";
+
+import { createStartingAdventurer, getCharacterCreationOptions } from "./character";
+
+describe("character creation", () => {
+  it("exposes legal starting options from the content pack", () => {
+    const options = getCharacterCreationOptions(sampleContentPack);
+
+    expect(options.weapons).toHaveLength(1);
+    expect(options.armour).toHaveLength(1);
+    expect(options.scrolls).toHaveLength(1);
+  });
+
+  it("builds a valid starting adventurer from legal choices", () => {
+    const adventurer = createStartingAdventurer(sampleContentPack, {
+      name: "Mira",
+      weaponId: "weapon.short-sword",
+      armourId: "armour.leather-vest",
+      scrollId: "scroll.lesser-heal",
+    });
+
+    expect(adventurer.name).toBe("Mira");
+    expect(adventurer.level).toBe(1);
+    expect(adventurer.stats.shift).toBe(2);
+    expect(adventurer.manoeuvreIds).toEqual([
+      "manoeuvre.exact-strike",
+      "manoeuvre.guard-break",
+    ]);
+    expect(adventurer.inventory.rationCount).toBe(3);
+    expect(adventurer.inventory.carried).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ definitionId: "potion.healing", quantity: 1 }),
+        expect.objectContaining({ definitionId: "scroll.lesser-heal", quantity: 1 }),
+      ]),
+    );
+  });
+
+  it("rejects an empty adventurer name", () => {
+    expect(() =>
+      createStartingAdventurer(sampleContentPack, {
+        name: "   ",
+        weaponId: "weapon.short-sword",
+        armourId: "armour.leather-vest",
+        scrollId: "scroll.lesser-heal",
+      }),
+    ).toThrow("Adventurer name is required.");
+  });
+});