Add deeper Stimulus integration

[leouofa]

• Ability to pass props & values w/ namespacing.
• Simplify the ability to pass targets via nested namespacing.
• Add property shortcuts for data (d: ), controller (c: ), props (p: ), values (v: ) and target (t:)

[leouofa]

data: { 'client--purchase-target': 'tokens'}

should become

target: { client--purchase: 'tokens' }

or

t: { client--purchase: 'tokens' }

[leouofa]

data: { 'client--purchase-tokens-token-price-param': token_price}

should become

params: { 'client--purchase': { tokens: token-price }}

or

p: { 'client--purchase': { tokens: token-price }}

[leouofa]

=r ux.div controller: 'client--purchase-tokens'

can be short-cutted as

=r ux.div c: 'client--purchase-tokens'