Add v0.0.1 release notes

RELEASE_NOTES.md

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+# Release Notes
+
+## v0.0.1
+
+### Added
+- Indicator catalog metadata via `get_capabilities`.
+- New indicators implemented and exposed through `get_indicator`:
+  - `atr`
+  - `bollinger`
+  - `vwap`
+- Composite regime endpoint:
+  - `get_regime(symbol, timeframe)` returns trend, momentum, volatility, Bollinger bands, VWAP, plus a heuristic early `reversal` signal.
+
+### Enhanced
+- `get_market_snapshot(symbol)` now includes additional context:
+  - EMA200, MACD histogram, ATR (+ ATR%), Bollinger bands, VWAP, and `trend_bias`.
+
+### Improved developer experience
+- Expanded and clarified MCP tool descriptions so clients/agents can discover valid inputs and expected outputs.
+
+### Fixed
+- Updated indicator tests to reflect newly supported indicators.