Omspy

Fixes
* Finvasia broker to suffix EQ to orders only when the exchange is NSE
Improvement
* Finvasia broker - more columns converted to proper types
* Kotak broker - more columns converted
Internals
* Kotak broker `create_instrument_master` to fetch dataframe from a different function, the new function is added for better modularity

Features
* `TrailingStopOrder` added to stop orders
* `TargetOrder` added to stop orders
* `BracketOrder` removed from stop orders

Improvements
* `StopOrder` and `StopLimitOrder` model changed

Fixes
* Kotak broker exchange_timestamp format handled correctly
* Finvasia broker exchange and broker timestamp format handled correctly
* Timestamp for kotak, finvasia brokers to be saved in db in expected format

Features
* `close_all_positions` could take a symbol_transformer function to transform symbols
* `close_all_positions` can take positions as an optional argument; this would help in passing select positions to square off instead of closing all positions
* `PegExisting` and `PeqSequential` can now take `modify_args` to add any extra broker arguments needed when modifying orders

Improvements
* `close_all_positions` to handle errors and valid quantity of any type
* type conversion done for data received from broker `Finvasia`
* 9 when an `Order` is added to `CompoundOrder` add an id automatically if there is no id
* 25 `PegSequential` order lock mechanism now dependent on `add_lock` method for each order; so each order could have its own order lock.

Fixes
* 15 do not update `Order` if order `is_done` (completed/rejected/canceled)

Internals
* tests improved for `Order` class

Improvements
* Instrument master for broker `kotak` could be generated for any combination of columns
* `modify` order could now take extra attributes to be passed on to broker
* tests rewritten with `PurePath` and other refactoring, credits to soumyarai2050 for pushing these changes

Fixes
* Instrument master for broker `kotak` to handle strike prices till 3 decimal places (for currency strikes)
* `modify_order` for broker `kotak` to correctly handle order types, especially MARKET

Improvements
* TOTP authentication added to Finvasia broker
* TOTP autentication added to MasterTrust broker

Features
* New `OrderStrategy` class added, an abstraction over CompoundOrder
* OrderLock mechanism added to `Order` so that each order would have its own unique lock