Move files imported from unicode-properties into subdirectory

Specifically  addons/xterm-addon-unicode-graphemes/src/third-party/.

test/api/Terminal.api.ts

@@ -33,7 +33,7 @@ describe('API Integration Tests', function(): void {
   });
 
   // fails with the grapheme injection, not sure why...
-  it.skip('Proposed API check', async () => {
+  it('Proposed API check', async () => {
     await openTerminal(page, { allowProposedApi: false });
     await page.evaluate(`
       try {

test/api/TestUtils.ts

@@ -47,13 +47,14 @@ export async function openTerminal(page: playwright.Page, options: ITerminalOpti
   await page.evaluate(`window.term = new Terminal(${JSON.stringify({ allowProposedApi: true, ...options })})`);
   await page.evaluate(`window.term.open(document.querySelector('#terminal-container'))`);
   
+    /*
   // TODO: make this injection configurable from outside
   await page.evaluate(`
     window.unicode = new UnicodeGraphemesAddon();
     window.term.loadAddon(window.unicode);
     window.term.unicode.activeVersion = '15-graphemes';
   `);
-
+*/
   await page.waitForSelector('.xterm-rows');
 }