finance-solution 0.2.0

Finance math: TVM, cashflow, amortization, equity path metrics, and technical analysis (SMA/EMA/MACD/Bollinger/Keltner/Stoch/VWAP/RVOL) with Result-only APIs, batch series, incremental state, solutions, and tables.
Documentation 
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//! Educational doubling-time helpers: Rule of 72 / 69 / 70 and exact formulas.
//!
//! Use [`doubling_solution`] for a full comparison at one rate (formulas + table),
//! or [`doubling_compare_rates`] to see how approximations behave across rates.
//!
//! All public functions return [`crate::FinanceResult`] (Result-only API, v0.1+).
pub mod rule_of_72;

#[doc(inline)]
pub use rule_of_72::*;