chore: add issue templates

Author: devraushan

.github/ISSUE_TEMPLATE/good-first-issue-2.md

@@ -17,3 +17,22 @@ Teach `VectorizedBacktest` to rebalance weekly or monthly via a `rebalance_freq`
 
 
 
+---
+name: "Good First Issue: Add weekly/monthly rebalancing option"
+about: Add `rebalance_freq` support to `VectorizedBacktest`
+labels: good-first-issue
+---
+
+### Summary
+Teach `VectorizedBacktest` to rebalance weekly or monthly via a `rebalance_freq` parameter.
+
+### Tasks
+- Update `_should_rebalance` to respect `W` and `M` frequencies.
+- Add tests in `tests/test_backtest.py`.
+- Document in README.
+
+### Definition of Done
+- Tests pass; daily default unchanged.
+
+
+

.github/ISSUE_TEMPLATE/good-first-issue-3.md

@@ -16,4 +16,3 @@ Modify CLI backtest command to also save a Plotly HTML chart for PnL.
 - CLI still supports Matplotlib PNG; Plotly HTML added.
 
 
-