Add ligature support to terminal take 2

[Tyriar]

Migrating over from stale #120452

Part of #34103

Todo:

• Finalize font access/chrome flag changes
• Fix disable ligatures without reload WebGL ligatures are storing wrong color for cells, causing bad rendering sometimes when type ahead is used in VS Code xtermjs/xterm.js#3288
• Type ahead causing weird rendering WebGL ligatures are storing wrong color for cells, causing bad rendering sometimes when type ahead is used in VS Code xtermjs/xterm.js#3288
• Support in web/fill in other get ctor functions
• Make sure font-finder isn't bundled into product build
• Bugs
  • User activation is required
  • Seg faults on macOS

[Tyriar]

Having some problems with permissions in Electron:

Edge seems to have removed the font access flag, but xterm.js' demo in Chrome and it works.

[Tyriar]

@deepak1556 any idea how to suppress the user activation requirement? We don't need to worry about this permission for the renderer's main web contents.

[Tyriar]

Seg fault when ligatures are enabled on macOS:

[main 2021-12-20T20:48:40.322Z] ExtensionHostStarterWorker created
[74401:1220/124844.691936:INFO:CONSOLE(301)] "%c[Extension Host] %cdebugger listening on port 5870 color: blue color:", source: vscode-file://vscode-app/Users/daimms/dev/Microsoft/vscode/out/vs/workbench/services/extensions/electron-browser/localProcessExtensionHost.js (301)
[main 2021-12-20T20:48:45.718Z] Starting extension host with pid 74477 (fork() took 946 ms).
[74401:1220/124846.043727:INFO:CONSOLE(21)] "Overwriting grammar scope name to file mapping for scope source.java.
Old grammar file: file:///Users/daimms/dev/Microsoft/vscode/extensions/java/syntaxes/java.tmLanguage.json.
New grammar file: file:///Users/daimms/.vscode-oss-dev/extensions/redhat.java-0.79.2/syntaxes/java.tmLanguage.json", source: vscode-file://vscode-app/Users/daimms/dev/Microsoft/vscode/out/vs/workbench/services/textMate/common/TMScopeRegistry.js (21)
[74401:1220/124846.062555:INFO:CONSOLE(209)] "%c[Extension Host] %cdebugger inspector at chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:5870/b125824e-9f59-4bad-97c8-bea88fe12996 color: blue color:", source: vscode-file://vscode-app/Users/daimms/dev/Microsoft/vscode/out/vs/workbench/services/extensions/electron-browser/localProcessExtensionHost.js (209)
Debugger listening on ws://127.0.0.1:5877/f4cc3b61-ff21-46c3-99e2-c44712d75584
For help, see: https://nodejs.org/en/docs/inspector
[74401:1220/124848.313735:INFO:CONSOLE(221)] "%c INFO color: #33f Starting worker process with pid 74486 (type: parcelWatcher, window: 1).", source: vscode-file://vscode-app/Users/daimms/dev/Microsoft/vscode/out/vs/platform/log/common/log.js (221)
2021-12-20 12:48:48.881 Code - OSS Helper (Renderer)[74462:6003175] CoreText note: Client requested name ".NewYork-Regular", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2021-12-20 12:48:48.881 Code - OSS Helper (Renderer)[74462:6003175] CoreText note: Set a breakpoint on CTFontLogSystemFontNameRequest to debug.
[74401:1220/124848.979259:INFO:CONSOLE(104)] "%c[IPC Library: Pty Host] %c%c INFO color: blue color:  color: #33f Persistent process "1": Replaying 224 chars and 1 size events", source: vscode-file://vscode-app/Users/daimms/dev/Microsoft/vscode/out/vs/base/common/console.js (104)
2021-12-20 12:49:07.891 Code - OSS Helper (Renderer)[74462:6003175] CoreText note: Client requested name ".NewYork-Regular", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2021-12-20 12:49:13.147 Code - OSS Helper (Renderer)[74462:6003175] CoreText note: Client requested name ".NewYork-Regular", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
Received signal 11 SEGV_MAPERR 000000000000
 [0x00011f3b8679]
 [0x0001224f4473]
 [0x000122510af9]
 [0x7ff8087f7e2d]
 [0x7ff84a010000]
 [0x00011e04b161]
 [0x00011edb4b0b]
 [0x00011f51a9f1]
 [0x00011f51cf30]
 [0x00011f5255ee]
 [0x00011f51cec5]
 [0x00011f516ff4]
 [0x00011f5365b5]
 [0x00011f37429c]
 [0x00011f38c576]
 [0x00011f3c4580]
 [0x00011f3c0b62]
 [0x00011f3c3d9f]
 [0x7ff8088a984d]
 [0x7ff8088a97b5]
 [0x7ff8088a9534]
 [0x7ff8088a7f6b]
 [0x7ff8088a752d]
 [0x7ff8114c53e1]
 [0x7ff8114c5137]
 [0x7ff8114c4ed5]
 [0x7ff80b2d28f0]
 [0x7ff80b2d0f5c]
 [0x7ff80b2c3359]
 [0x00011f3c4c26]
 [0x00011f3c387b]
 [0x00011f38d94f]
 [0x00011f35ffac]
 [0x00011ece4c11]
 [0x00011ece6392]
 [0x00011ece2294]
 [0x00011e1388a7]
 [0x00011e1383a8]
 [0x00011e1374f6]
 [0x00011e1375e2]
 [0x00011da0e766]
 [0x00010eab87e6]
 [0x0001157184fe]
 [0x000000000000]
 [0x00010eab7000]
[end of stack trace]
[1220/124919.589647:WARNING:crash_report_exception_handler.cc(240)] UniversalExceptionRaise: (os/kern) failure (5)
Segmentation fault: 11

[Tyriar]

Tracking the user activation problem in #140106

[Tyriar]

#157008