moving rule server actions to separate file (#1677)

.../desktop-client/src/components/rules/ActionExpression.tsx

packages/desktop-client/src/components/rules/RuleRow.tsx

packages/loot-core/src/server/accounts/transaction-rules.ts

packages/loot-core/src/server/accounts/transactions.ts

packages/loot-core/src/server/errors.ts

packages/loot-core/src/server/main.ts

packages/loot-core/src/server/rules/app.ts

packages/loot-core/src/server/rules/types/handlers.ts

packages/loot-core/src/types/models/rule.d.ts

packages/loot-core/src/types/server-handlers.d.ts

upcoming-release-notes/1677.md