feat: pluggable printer support

[NaamuKim]

Closes #5

• Add optional print?(node: any): string to the Parser interface
• replaceWith(astNode) now serializes builder-created nodes via the active printer
• Expose z.print(node) for manual serialization
• Falls back to internal printer when print is not provided (no breaking change)

[github-actions]

jscodeshift API Compatibility

jscodeshift API Compatibility Report

Overall: 63/63 (100.0%)

• supported: 63, partial: 0, not-supported: 0

Core (11/11)

API	Status	Note
z(source)	✅ supported
namedTypes (z.Identifier etc)	✅ supported
builders (z.identifier() etc)	✅ supported
match(path, filter)	✅ supported
use(plugin)	✅ supported
withParser(parser)	✅ supported
registerMethods	✅ supported
types	✅ supported
template	✅ supported
filters	✅ supported
mappings	✅ supported

Collection (15/15)

API	Status	Note
filter(callback)	✅ supported
forEach(callback)	✅ supported
some(callback)	✅ supported
every(callback)	✅ supported
map(callback, type?)	✅ supported
size()	✅ supported
nodes()	✅ supported
paths()	✅ supported
getAST()	✅ supported
toSource(options?)	✅ supported
at(index)	✅ supported
get(...fields)	✅ supported
getTypes()	✅ supported
isOfType(type)	✅ supported
length	✅ supported

Traversal (4/4)

API	Status	Note
find(type, filter?)	✅ supported
closestScope()	✅ supported
closest(type, filter?)	✅ supported
getVariableDeclarators(nameGetter)	✅ supported

Mutation (4/4)

API	Status	Note
replaceWith(nodes)	✅ supported
insertBefore(insert)	✅ supported
insertAfter(insert)	✅ supported
remove()	✅ supported

JSX (4/4)

API	Status	Note
findJSXElements(name?)	✅ supported
findJSXElementsByModuleName(moduleName)	✅ supported
childNodes()	✅ supported
childElements()	✅ supported

VariableDeclarator (2/2)

API	Status	Note
findVariableDeclarators(name?)	✅ supported
renameTo(newName)	✅ supported

NodePath (23/23)

API	Status	Note
getValueProperty(name)	✅ supported
get(...names)	✅ supported
each(callback, context?)	✅ supported
map(callback, context?)	✅ supported
filter(callback, context?)	✅ supported
shift()	✅ supported
unshift(...args)	✅ supported
push(...args)	✅ supported
pop()	✅ supported
insertAt(index, ...args)	✅ supported
insertBefore(...args)	✅ supported
insertAfter(...args)	✅ supported
replace(replacement?, ...args)	✅ supported
value	✅ supported
parentPath	✅ supported
name	✅ supported
prune(...args)	✅ supported
needsParens(assumeExpressionContext?)	✅ supported
canBeFirstInStatement()	✅ supported
firstInStatement()	✅ supported
node	✅ supported
parent	✅ supported
scope	✅ supported