Split common into composite subprojects with project references

- common/tsconfig.json is a solution root referencing layer tsconfigs
- Each layer has composite tsconfig with correct references and outDir
- Break buffer/services cycle via buffer-local service interfaces
- Move cell types, keyboard/unicode types, TaskQueue, and TerminalOptions
- Exclude *.test.ts from composite builds; fix parser IDisposable imports

Co-authored-by: Daniel Imms <Tyriar@users.noreply.github.com>

src/common/tsconfig.json

@@ -1,42 +1,15 @@
 {
   "extends": "../tsconfig-library-base",
-  "compilerOptions": {
-    "lib": [
-      "es2015",
-      "es2016.Array.Include",
-      "es2019.string",
-      "es2021.weakref",
-      "dom"
-    ],
-    "outDir": "../../out/common",
-    "rootDir": ".",
-    "types": [
-      "../../node_modules/@types/mocha"
-    ],
-    "paths": {
-      "common/base/*": ["./base/*"],
-      "common/encoding/*": ["./encoding/*"],
-      "common/data/*": ["./data/*"],
-      "common/buffer/*": ["./buffer/*"],
-      "common/parser/*": ["./parser/*"],
-      "common/input/*": ["./input/*"],
-      "common/services/*": ["./services/*"],
-      "common/terminal/*": ["./terminal/*"],
-      "common/public/*": ["./public/*"],
-      "common/*": ["./*"],
-      "*": ["../*"]
-    }
-  },
-  "include": [
-    "./base/**/*",
-    "./encoding/**/*",
-    "./data/**/*",
-    "./buffer/**/*",
-    "./parser/**/*",
-    "./input/**/*",
-    "./services/**/*",
-    "./terminal/**/*",
-    "./public/**/*",
-    "../../typings/xterm.d.ts"
+  "files": [],
+  "references": [
+    { "path": "./base" },
+    { "path": "./encoding" },
+    { "path": "./data" },
+    { "path": "./buffer" },
+    { "path": "./parser" },
+    { "path": "./input" },
+    { "path": "./services" },
+    { "path": "./terminal" },
+    { "path": "./public" }
   ]
 }