Mapped Endian Format Options

I thought there might be a way to title case a word using an `Intl` function, but I couldn't find any.

I also wanted to strictly check the value of my endian types mapped value array, but I'm not sure how you could make a tuple out of a union. I'd like to do `["big", "little"] satisfies tupleof Endian` essentially. This works nicely as well though.

I also removed the demo Launch Handler manifest config from the last commit.

microsoft/TypeScript#13298
https://stackoverflow.com/questions/1026069/how-do-i-make-the-first-letter-of-a-string-uppercase-in-javascript
https://dev.to/zenulabidin/moment-js-vs-intl-object-4f8n
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames
https://stackoverflow.com/questions/1026069/how-do-i-make-the-first-letter-of-a-string-uppercase-in-javascript/60751434#60751434
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Segmenter
https://www.geeksforgeeks.org/convert-string-to-title-case-in-javascript/

public/manifest.webmanifest

@@ -32,8 +32,5 @@
         "application/octet-stream": [".nbt", ".dat", ".dat_old", ".mcstructure", ".litematic", ".schem", ".schematic"]
       }
     }
-  ],
-  "launch_handler": {
-    "client_mode": "focus-existing"
-  }
+  ]
 }

src/FormatOptions.tsx

@@ -65,26 +65,21 @@ export function FormatOptions(props: FormatOptionsProps){
         <fieldset>
           <legend>Endian</legend>
 
-          <label>
-            <input
-              type="radio"
-              name="endian"
-              value="big"
-              checked={props.getEndian() === "big"}
-              oninput={() => props.setEndian("big")}
-            />
-            Big
-          </label>
-          <label>
-            <input
-              type="radio"
-              name="endian"
-              value="little"
-              checked={props.getEndian() === "little"}
-              oninput={() => props.setEndian("little")}
-            />
-            Little
-          </label>
+          {
+            (["big", "little"] satisfies Endian[])
+              .map(endian =>
+                <label>
+                  <input
+                    type="radio"
+                    name="endian"
+                    value={endian}
+                    checked={props.getEndian() === endian}
+                    oninput={() => props.setEndian(endian)}
+                  />
+                  {`${endian.slice(0,1).toUpperCase()}${endian.slice(1)}`}
+                </label>
+              )
+          }
         </fieldset>
 
         <fieldset>