[wip] start making vanillae js library

It compiles but there's some NYI functions

This is going to have all the common functions that we need all over the place

- base64 encode/decode
- base58 encode/decode
- rlp encode/decode
- transaction types
- transaction formation
- reading stuff from the transaction
- safe type
- (maybe) AWCP

This commit contains a refactored version of my prior base64 implementation,
which is more imperativey and less "trying to fit Erlang into TS".

bindings/typescript/tsconfig.json

@@ -0,0 +1,16 @@
+{"compilerOptions" : {"target"                           : "es2022",
+                      "strict"                           : true,
+                      "esModuleInterop"                  : true,
+                      "skipLibCheck"                     : true,
+                      "forceConsistentCasingInFileNames" : true,
+                      "noImplicitAny"                    : true,
+                      "strictNullChecks"                 : true,
+                      "strictPropertyInitialization"     : true,
+                      "sourceMap"                        : true,
+                      "outDir"                           : "dist",
+                      "declaration"                      : true},
+ "$schema"         : "https://json.schemastore.org/tsconfig",
+ "display"         : "Recommended",
+ "include"         : ["src/**/*"],
+ "exclude"         : ["src/jex_include"],
+ "composite"       : true}