Deconstruct VERSION-SPEC-RANGE.md into multiple topic-based markdown files

[mjherzog]

The task is to replace VERSION-SPEC-RANGE.rst with:

• JSON Schema files
• Markdown files organized according to the planned structure for the VERS Ecma Standard

[mjherzog]

The following table is a draft proposal to deconstruct VERSION-SPEC-RANGE.md into multiple topic-based markdown files.

VERS-RANGE-SPEC.md Line numbers	Section title / description	New markdown file
1 - 52, 124 - 150	Introduction	introduction
53 -123	Version string conventions (history)	examples
151 - 242	VERS overview	overview
243 - 375	VERS specification	specification
376 - 554	How to parse and validate VERS	how-to-parse
555 - 633	Known version schemes	known-version-schemes
634 - 658	Implementations and alternatives	implementations-and-alternatives
659 - 958	FAQ / Why is VERS needed/	faq