Create DSL framework for content rule checks

[ronaldtse]

Metanorma implements content rule checks. We need to create a framework to allow content rules to be defined by a third-party that validates on given content.

In Metanorma, they are defined by the rules/guidelines of the publisher of content.

These rule checks can be included/inherited.

Maybe develop a DSL for this to operate on the Coradoc content tree.

Some of these rules are generic validation rules.

Crossreferences: (ID _44fa3797-4acb-42cb-9a74-55b07fe9344c): 橋梁施設台帳 does not have a corresponding anchor ID in the bibliography!
Crossreferences: (ID _44d0f6a2-f856-479e-bb4f-235155806838): トンネル施設台帳 does not have a corresponding anchor ID in the bibliography!

Style: (ID toc6_03_01): More than 1 ordered list in a numbered clause

Style: (ID _240ecb51-bf05-f64e-3851-96dc0924b801): no space between number and SI unit: 95m
Style: (ID _2fbca6e8-7156-b0ec-f5fe-f27569876c35): no space before percent sign: 1%

Style: (ID _33792607-c3c0-69ab-80b5-a1978626e6fd): Figure should have title
Style: (ID _081b53fe-4188-7918-27d4-0ab3e33bae61): Table should have title
Style: toc0_02:改定の概要: subclause is only child

Rules like these are organizational-specific:

Style: (ID _333091cd-362c-40a0-4eac-c8319bd7e757): image name images/003.svg does not match DRG requirements: expect 1_ed4fig

Style: (ID _81bca218-92a1-5e06-e860-84f29809c4bd): There is an instance of figure nested within table