feat: init the repo

.github/ISSUE_TEMPLATE/indicator_request.md

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+---
+name: Indicator request
+about: Request a new technical analysis indicator or a variant of an existing one
+title: "[Indicator] "
+labels: new-indicator
+assignees: ''
+---
+
+## Indicator Name
+
+<!-- The standard name, e.g. "Chande Momentum Oscillator (CMO)" or "Kaufman Adaptive MA (KAMA) variant" -->
+
+## Category
+
+<!-- Which category does this indicator belong to? -->
+- [ ] Overlap Studies (moving averages, bands)
+- [ ] Momentum Indicators
+- [ ] Volatility Indicators
+- [ ] Volume Indicators
+- [ ] Price Transform
+- [ ] Statistic Functions
+- [ ] Cycle Indicators
+- [ ] Extended / Multi-output Indicators
+- [ ] Other: ___
+
+## Reference / Formula
+
+<!-- Link to the authoritative reference (book, paper, website) and/or the mathematical formula. -->
+
+**Formula:**
+```
+# e.g.
+# CMO = 100 × (SumUp − SumDown) / (SumUp + SumDown)
+```
+
+**Reference:** <!-- URL or book citation -->
+
+## TA-Lib equivalent
+
+<!-- If this indicator exists in TA-Lib, what is the function name? -->
+- [ ] This indicator is in TA-Lib as: `TALIB_FUNCTION_NAME`
+- [ ] This indicator is NOT in TA-Lib (extension indicator)
+
+## Expected API
+
+<!-- How should the function look in ferro_ta? -->
+```python
+from ferro_ta import MY_INDICATOR
+import numpy as np
+
+close = np.array([...])
+result = MY_INDICATOR(close, timeperiod=14)
+# result: np.ndarray of float64, same length as close
+```
+
+## Use Case
+
+<!-- Why do you need this indicator? What trading strategy or analysis does it support? -->
+
+## Priority / Urgency
+
+- [ ] Nice to have
+- [ ] Would significantly improve my workflow
+- [ ] Blocking me from using ferro_ta
+
+## Willingness to Contribute
+
+- [ ] I'd like to implement this myself (see `CONTRIBUTING.md`)
+- [ ] I can help test / validate the implementation
+- [ ] I just want to request it — up to the maintainers