Feature: Babel plugin rewrite

[lxsmnsyc]

Features:

• Component reloading - Previously, solid-refresh only allows single component reloading through export default. This change allows not only export default but every top-level component declaration (local included) to be reloaded.
• Granular component preservation - This allows components in the same file to preserve lifecycles if it has not changed after module reload.

Code changes:

• Rewrites the plugin into TypeScript (this changes the build config for rollup)
• Removes the .jsx/.tsx filter to allow transforms through .js/.ts.
• Removed ExportDefaultDeclaration transform and instead transforms VariableDeclarator and FunctionDeclaration at the top-level of the program, this means that this plugin can now handle multi-component hot transformation.
• Adds pascal-case check as component heuristic.
• Adds props identifier check for anonymous functions (implies anonmous components)

Side:

• Migrate esm and standard to TypeScript
• Add id and signature parameter to esm and standard

Questions:

• Should I just use Program and transform the body instead of visiting VariableDeclarator and FunctionDeclaration directly?
• How do we resolve $$registrations to prevent users from redefining?

[ryansolid]

Thank you so much. This is amazing.