refactor: enforce mandatory brackets for composite values

Implements Phase 1 and 2 of the syntax rework plan:
- Brackets `[]` are now mandatory for all tuple and array values.
- Removed the `[Type][]` array syntax; arrays now only use `Type[]`.
- `[single]` is now strictly a 1-tuple rather than an array.
- Updated documentation and test fixtures to reflect these breaking
  changes.

src/csv-loader/fixtures/encounter.csv

@@ -3,5 +3,5 @@
 
 id,type,name,description,enemies,dialogue
 string,EncounterType,string,string,EnemyList,string
-cactus_pair,minion,仙人掌怪,概念：防+强化。【尖刺X】：对攻击者造成X点伤害。,[仙人掌怪;12;[]];[仙人掌怪;12;[]],
-snake_pair,minion,蛇,概念：攻+强化。给玩家塞入蛇毒牌（1费：打出时移除此牌。弃掉时受到3点伤害）。,[蛇;10;[[poison;2];[quick;1]]],
+cactus_pair,minion,仙人掌怪,概念：防+强化。【尖刺X】：对攻击者造成X点伤害。,[[仙人掌怪;12;[]];[仙人掌怪;12;[]]],
+snake_pair,minion,蛇,概念：攻+强化。给玩家塞入蛇毒牌（1费：打出时移除此牌。弃掉时受到3点伤害）。,[[蛇;10;[[poison;2];[quick;1]]]],

src/csv-loader/fixtures/enemy_intents.csv

@@ -4,4 +4,4 @@
 
 id,enemy,initialIntent,nextIntents,brokenIntent,effects
 string,string,boolean,string[],string[],IntentEffects
-仙人掌怪-boost,仙人掌怪,true,仙人掌怪-boost;仙人掌怪-defend,,[user;spike;1];[user;defend;4]
+仙人掌怪-boost,仙人掌怪,true,[仙人掌怪-boost;仙人掌怪-defend],,[[user;spike;1];[user;defend;4]]

src/csv-loader/tests/parseCsv-typeDeclarations.test.ts

@@ -209,7 +209,7 @@ describe("parseCsv - type declarations", () => {
       "# type IntentEffects = IntentEffect[]",
       "id,effects",
       "string,IntentEffects",
-      "boost,[user;spike;1];[user;defend;4]",
+      "boost,[[user;spike;1];[user;defend;4]]",
     ].join("\n");
 
     const result = parseCsv(csv, { emitTypes: false });
@@ -233,7 +233,7 @@ describe("parseCsv - type declarations", () => {
       "# type IntentEffects = IntentEffect[]",
       "id,effects",
       "string,IntentEffects",
-      "boost,[user;spike;1];[user;defend;4]",
+      "boost,[[user;spike;1];[user;defend;4]]",
     ].join("\n");
 
     const result = parseCsv(csv, {
@@ -260,7 +260,7 @@ describe("parseCsv - type declarations", () => {
       '# type Type = "apple" | "orange"',
       "id,items",
       "string,[Type; int][]",
-      "001,[apple;2];[orange;3]",
+      "001,[[apple;2];[orange;3]]",
     ].join("\n");
 
     const result = parseCsv(csv, { emitTypes: false });
@@ -292,7 +292,7 @@ describe("parseCsv - type declarations", () => {
       "# type Entry = [@user]",
       "id,entry",
       "string,Entry",
-      "1,1",
+      "1,[1]",
     ].join("\n");
 
     const result = parseCsv(csv, {