* First attempt at aliases for require
* test+initial support for const x=require
* 1st round of baseline improvements
* 2nd round of baseline updates
* support property access after require
* check @type tag on require
* forbid expando missing namespaces on aliases
taken from #39558 as soon as it was created
* accept error baselines that are good, actually
* Scribbling on d.ts emit code
* use getSpecifierForModuleSymbol
* hideous hack for module.exports of aliases
* Fix module.exports.x --> export list emit
* fix isLocalImport predicate
* require only creates aliases in JS
* re-handle json imports
* update fourslash baseline
* Cleanup in the checker
1. Simplify alias resolution.
2. Simplify variable-like checking.
3. Make binding skip require calls with type tags -- they fall back to
the old require-call code and then check from there.
I haven't started on the declaration emit code since I don't know what
is going on there nearly as well.
* Function for getting module name from require call
* First round of cleanup plus a new test
Found one missing feature, not sure it's worth adding.
* more small cleanup
* more cleanup, including lint
* use trackSymbol, not serializeTypeForDeclaration
* Code review comments, plus remove unneeded code
Ad-hoc type reference resolution for `require` isn't needed anymore.
* find all refs works
* remove old ad-hoc code
* make it clear that old behaviour is not that correct
* update api baselines
* remove outdated comment
* PR feedback
1. Fix indentation
2. Add comment for exported JSON emit
3. Add test case for nested-namespace exports.
* add a fail-case test (which passes!)