Create Roadmap v1 Milestone and include issues

[evermake]

• Migrate to node from bun (Bun is unstable)
• Migrate to tsc from tsdown (tsc is enough)
• Avoid hardcoded exceptions and method results indexed by description. Instead, introduce types/methods hashes for version tracking, and overrides object for overriding value types, descriptions, method results, etc.
• Document custom format in README
• Update package exports: . should explicitly export methods and types. Add separate format export with internal types.
• Add badge with supported Bot API version.