feat: add rebar3 nova gen_live command

[Taure]

Summary

• Adds rebar3 nova gen_live command that generates Arizona LiveView CRUD views mapped to Kura schemas (similar to mix phx.gen.live)
• Fixes the nova new --arizona home_view scaffold to use the current Arizona API (arizona_view:new/3, arizona_template:from_html, arizona_parse_transform)

Usage

rebar3 nova gen_live --name users --fields name:string,email:string,active:boolean

Generated files

File	Purpose
src/views/{app}_user_index_view.erl	Table listing with delete
src/views/{app}_user_show_view.erl	Detail view
src/views/{app}_user_new_view.erl	Create form
src/views/{app}_user_edit_view.erl	Edit form with pre-filled values
src/schemas/{app}_user.erl	Kura schema
src/migrations/m{ts}_create_users.erl	Kura migration
test/{app}_user_live_SUITE.erl	CT test suite

Flags

• --actions index,show,new,edit — select which views to generate
• --no-schema — skip schema + migration generation
• Field types: string, text, integer, float, boolean, date, utc_datetime, uuid, jsonb

Key design decisions

• Views call kura_repo_worker / kura_changeset directly (no context layer)
• Uses ~"""" (4-quote) outer templates with ~""" (3-quote) inner templates for render_list callbacks
• Correct Arizona state API: arizona_view:get_state/update_state + arizona_stateful:put_binding/get_binding

Depends on #62 (feat/nova-new)

Test plan

• rebar3 ct — all 21 tests pass (10 gen_live + 11 nova_new)
• End-to-end: generate project with --arizona --kura, run gen_live, verify rebar3 compile succeeds

[burbas]

I think that we don't need a new command for each type of sub-component we are generating. It would make more sense to have something similar to

rebar3 nova gen live users -- fields name:string, email:string,active:boolean

The name (In this example users) will always be required so don't see any point of having that as a flag. And we might want to be able to generate controllers, plugins etc. So just calling rebar3 nova gen would then result in a help-section describing all different modules to generate.

[Taure]

Superseded by #63 which includes gen_live plus the unified gen dispatcher, template system, and tests.