Use .tsx extension for TypeScript type checking

Fix ts: 'tsc' behavior around sourcemaps

LSP pass on more completion info

* Allow undefined sourcemap to be returned
* Request actual sourcemap from TypeScript when trans...

LSP support importing directories with index.civet

Support TypeScript `paths` alias

Fixes #920

Wrap thick pipes in parens

`(foo)` for custom operators `foo`

Added (+) binary op to function shorthand

Extends shorthand `<` and negated forms

`T?` → `T | undefined`; `T??` → `T | undefined | null`

Fixes #144

Conditional types via if/unless

Optional function return types

Optional let declarations

++= concat assignment

++ concat operator

Also Unicode version ⧺

as! T

Fix unplugin emitDeclaration and Windows behavior

Fixes #893

Fixes #773

Fix ASI before ranges

Fixes #889

Stricter unary operators (before &)

Fixes #885

`[a ... b]` is a range, `[a ...b]` is implicit call

Allow arbitrary unary operators before ampersand function notation

docs: Revise tagline, opening paragraph, and purple

Fixes #844

`not` requested in #854

Update font; tagline

Use .-1 notation in Civet source

svg backgrounds

Support x?.-1 and other optional fancy accesses

Omit obviously unreachable breaks from switch

Fix while(cond) without space

Fixes #870

Color tweaks to improve contrast

Fixes #873

Update docs style

- Removed border radius
- Added shadows
- Fixed light mode code legibility

Add angle brackets to surroundingPairs

Handle labeled loops

Fixes #863

Omit return with Iterator/Generator<*, void> type

Fixes #862

Fix implicit generators in assigned -> functions

Fixes #864