[CLI] Adds support for generating pages

[davidpatters0n]

Description of the Change

Address: #671

Alternate Designs

None

Benefits

Allows developers to run amber g page About

Possible Drawbacks

None

[faustinoaq]

@davidpatters0n Thank you for this nice contribution!

Can we add a page generator as well 😅

Right now is just amber g view About, but is just the view, so I can't add quickly a new page without touching the code

Currently with this PR:

# 1. Generate src/views/about_view.slang
amber g view About

# 2. Create src/controllers/about_controllers.slang
amber g controller About

# 3. Edit controller to render about view
nano src/controllers/about_controllers.slang

# 4. Edit config/router.cr to point /about path to AboutController :index
nano config/router.cr

With proposed amber g page About

# Generate new view, controller and update the new path to router file
amber g page About

Lucky framework can do something similar using lucky gen.page About

@amberframework/contributors WDYT?

[faustinoaq]

BTW, I think we can change raise "Template not found" by:

CLI.logger.error "Template not found", "Generate", :light_red

less verbose, more clean

[davidpatters0n]

@faustinoaq - Sure I'll make this amendment later on today. 👍 thanks for the feedback

[eliasjpr]

@faustinoaq Lucky follows a different naming conventions. I am fine not adding a Page generator also that seems that can be addressed in a separate PR.

[elorest]

@faustinoaq A new page should be added with

amber g controller About about:get with existing generators.

[faustinoaq]

@eliasjpr @elorest Yeah, I wanted to review this a bit more but I see it just got merged (and reverted) 😅