chore: bump dependencies in fastify and vue packages

[premsgr]

chore: update Fastify, React, and Vue dependencies

Tasks completed

• Bumped dependencies in Fastify, React, and Vue packages (package.json and pnpm-lock.yaml).
• Migrated ESLint config from legacy .eslintrc to flat eslint.config in fastify, react, and vue packages.
• Renamed React API/hooks files to pascal case (e.g. useQuery.ts → UseQuery.ts, useMutation.ts → UseMutation.ts) and route files to PascalCase (e.g. getSaasAppRoutes.tsx → GetSaasAppRoutes.tsx).
• Renamed Vue API, composables, stores, and route files to PascalCase where applicable (e.g. getSaasAdminRoutes.ts → GetSaasAdminRoutes.ts).
• Updated imports and references across fastify, react, and vue packages for renamed modules.
• Applied lint fixes across the touched packages.