[Suggestion]: Table syntax proposal

[boltlessengineer]

Define table as new kind of structural detached modifiers using = as prefix.

I'm using = because I found it feels visually most appealing. It should be : following v1 spec. I'm aware of conflict with =macro...=end which is a syntax I actually want to replace with @code...@end but that's whole new topic.

Basically stealing the "multi-children list item" design from @vhyrro and @mrossinek.

=
== Character
== Name
== Categories
=
== `*`
== Headings
==
   - Structural
   - Nestable
=
== `-`
== Unordered List
==
   - Nestable
=

Which will be:

Character	Name	Categories
*	Headings	- Structural - Nestable
-	Unordered List	- Nestable

With syntax suggested in #50, now heading will look like:

* heading A

  paragraph under heading A

** heading B

   paragraph under heading B
*

paragraph outside heading A content

So it is reasonable to adopt exactly same syntax to tables:

= <- Row 1
== <- Cell A1
   paragraph under Cell A1

   paragraph under Cell A1
==
   paragraph under Cell B1
= <- Closing Row 1

paragraph outside of table

It's still a pretty rough idea. But seems we can easily merge these two.

[boltlessengineer]

#51 can make inline table row possible like what paragraph segments from v1 spec did:

=
== A1 = B1
== A2 = B2
=

Although some people are against to "multi line heading" idea. We can still only adopt the heading closing modifier only without multi-line heading itself.