Implement a new parser

[williamthome]

Description

This PR implements a new parser called arizona_template_parser. It will replace arizona_tpl_parse.

I believe this PR's new module is enough for now. We "tokenize" the template using the arizona_template_scanner and organize it into "elements" using the arizona_template_parser. These elements are expected by the compiler to generate a "compiled" tree, i.e., the return of the arizona_live_view render callback is the return of the arizona_template_parser.

Closes #144.
Depends on #143. It has been merged.

• I have performed a self-review of my changes
• I have read and understood the contributing guidelines

[paulo-ferraz-oliveira]

Approved pending minor comments. Feel free to resolve to move forward:

1. they're not super-relevant
2. we already have a task to further look at the interface (Define which functions, types, ... are the interface #102)

😄

[paulo-ferraz-oliveira]

Good stuff, @williamthome.

[williamthome]

I'm putting this PR into draft. I'll change types to opaque and add support functions for them.

[williamthome]

I'll keep types not opaque to keep going on.