feat(COMPT-44): README guide + changeset for v0.1.0

- Rewrote README as an end-to-end usage guide for @ciscode/query-kit
- createQuery: key builder, fetcher, useQuery shorthand, direct key/fn access
- usePaginatedQuery: offset mode (nextPage/prevPage) and cursor mode (fetchNextPage/hasNextPage)
- createMutation + invalidateQueries full lifecycle example
- setQueryData typed updater example
- API reference table covering all exports
- Peer dep @tanstack/react-query >=5 clearly stated
- Changeset: minor bump to v0.1.0 (initial public release)

Author: a-elkhiraooui-ciscode

.changeset/v0-1-0-initial-release.md

@@ -0,0 +1,12 @@
+---
+"@ciscode/query-kit": minor
+---
+
+Initial public release v0.1.0.
+
+- `createQuery` — typed query definition factory (key builder + fetcher + `useQuery` shorthand)
+- `usePaginatedQuery` — offset and cursor pagination hook with flat data array
+- `createMutation` — typed mutation definition factory (`useMutation` shorthand)
+- `invalidateQueries` — type-safe query invalidation via `QueryDefinition` (no raw string keys)
+- `setQueryData` — type-safe cache write via `QueryDefinition`
+- Peer dependency: `@tanstack/react-query >= 5`