* update: impl DataProvider for oracle

* update: optimize code

* FixedU128 deconstruct.

* documentation formatting.

* add fixed u128

* update fixed-u128

* fix: divide 0 will panic

* fix: will use u128::max_value() when try_into failued in div and mul functions

* test: add checked_div test

* rename: palette to frame

* update fixed-128

* remove add/sub/mul/div operator

* add overflow/underflow tests

* rename to FRAME

* fix test

* add feed_values

* fix tests

* workaround check wasm issue

* workaround build issue

* Rename paint to palette.

* Fix typo.

* Update comments.

* Update paint balance adapting.

* Update error type.

* Update multi currency to basic currency adapting.

* Remove HasCompact bound for CurrencyId.

* Update BasicCurrencyAdapter struct define.

* implement Drop for enumerator

* add drop

* LinkedList iterator.

* Update naming.

* Default impl for LinkedItem.

* LinkList: add 'take_all' enumeration.

* Reuse Enumerator for take_all and enumerate fn.

* LinkedList: update take fn impl.

* rename srml to paint

* fix case

* fix oracle

* fix warning

* first version of oracle module

* Update slash: return gap instead of slashed amount.

* Add unit test for tokens module slash.

* Impl BasicCurrency & BasicCurrencyExtended.

* Add currencies module.

* Minor fixes

* Add equality bounds for CurrencyId.

* Currencies: add transfer dispatch.

* Currencies: impl BasicCurrencyExtended.

* Add unit tests for currencies module.

* More unit test for currencies module.

* Currencies module: add NativeCurrency type.

* Update unit tests for native currency.

* Add BasicCurrency impl for any type which implements srml_support::traits::Currency.

* Fix typo.

* Add BasicCurrencyAdapter.

* BasicCurrencyAdapter unit tests.

* Update BasicCurrencyAdapter.

* Update slash impl for BasicCurrencyAdapter.

* feat: prices module

* fix: add check to avoid dividing by zero

* fix: delete num_traits dependency

* add auction module

* remove redundant traits definition

* add tests

* get reference instead of ownership

* optimized code

* fix check with latest substrate

* update nigthly version

* trying to fix CI

* trying to fix ci

* fix

* fix

* add linked item

* fix ignore

* add tests for linked_item

* support workspace workflow

* add missing `--all`

* add common traits

* apparently rebase merge don't trigger precommit

* Tokens module: impl MultiCurrencyExtended.

* Minor fixes.

* remove workspace, fix githook under submodule, use add run script to run cargo command on all files

* update run script and use it for format

* fix build issue

* add quote

* fix CI

* Error type for MultiCurrency trait and tokens module.

* fmt

* Update error type.

* Update transfer unit test.

* Tokens module unit tests.

* Remove workspace src directory

* Add example crate.

* fmt

* Update example.

* Minor fixes.

* Remove allow dead code.