(env): add initial, partial tsdx support

- add scripts and devDeps for tsdx
  - will add typings, module, files, etc when code is converted to TS
- add tsdx .gitignore stuff
- add partial tsdx tsconfig
  - react / jsx support is unnecessary
  - a bunch of redudant things removed that were already covered in
    strict mode
  - removed strict mode for now -- will gradually add that in

(deps): add tsdx and TS to devDeps (no other peerDeps/devDeps for now)
- no tests, husky, prettier, etc yet (though I lint with standard
  globally)

.gitignore

@@ -1,3 +1,10 @@
+### tsdx ###
+
+dist/
+.rts2_cache_cjs
+.rts2_cache_esm
+.rts2_cache_umd
+
 ### Node ###
 
 # Logs