[feat] 增加对海外银行 bmo provider 的支持

[ramsayleung]

Description

double-entry-generator 增加对海外银行 BMO 的账单支持

BMO

BMO 是加拿大的五大银行之一, 与 TD 齐名, 主要业务在加拿大.

Transaction Statement

Debit

BMO的存储卡账单相当简洁 (简陋), 只有5个字段:

First Bank Card	Transaction Type	Date Posted	Transaction Amount	Description
'5678653123124124'	CREDIT	20230501	0.01	[DN]ACFS MSP/DIV
'5678653123124124'	DEBIT	20230518	-68.32	[CW]TELUS MOB
'5678653123124124'	DEBIT	20230523	-50.0	[CW]BC HYDRO
'5678653123124124'	DEBIT	20230612	-40.0	[IB] 6088 #3 ROAD

1. 只有支付日期，没有支付具体时间
2. 没有交易对手(Peer) 和 商品(Item)字段, 都合并在 Transaction Description, 因此将 Transaction Description 当作 Item 字段, Peer 字段为 TD

   Credit

   信用卡账单更简单，有用的字段只有3个, 通过金额正负来判断交易方向.

Item #	Card #	Transaction Date	Posting Date	Transaction Amount	Description
1	'5191230567984561'	20230511	20230512	3.27	COSTCO WHOLESALE W54 SURREY BC
2	'5191230567984561'	20230511	20230512	85.06	COSTCO WHOLESALE W54 SURREY BC
3	'5191230567984561'	20230512	20230515	- 6.0	PAYMENT RECEIVED THANK YOU

Modification

1. example/bmo: 增加bmo 相关的配置, 生成账单
2. analyser/bmo: analyser 增加 bmo 相关内容
3. provider/bmo: 增加 bmo provider
4. test: 增加 bmo 相关test

我尽量提交最少修改的PR, 但是新增一个 workable provider 以及相应 test, example 的改动量着实较大, 见谅见谅

Motivation and Context

112

Dependencies

None

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

How has this been tested?

• [x]: sh test/bmo-test-beancount.sh: passed
• [x]: sh test/bmo-test-ledger.sh: passed
• [x]: make test: all tests passed

Is this change properly documented?

Please make sure you've properly documented the changes you're making.

Don't forget to add an entry to the CHANGELOG/README if necessary (new features, breaking changes, relevant internal improvements).

后续提另外的PR更新README.