Restructure project directories (#333)

`/client/web` -> `/frontend`
`/client/cli` -> *delete for now*
`/client/native` -> *delete for now*
`/core/editor` -> `/editor`
`/core/document` -> `/graphene`
`/core/renderer` -> `/charcoal`
`/core/proc-macro` -> `/proc-macros` *(now plural)*

frontend/tsconfig.json

@@ -0,0 +1,37 @@
+{
+	"compilerOptions": {
+		"target": "ES2020",
+		"module": "esnext",
+		"strict": true,
+		"jsx": "preserve",
+		"importHelpers": true,
+		"moduleResolution": "node",
+		"experimentalDecorators": true,
+		"skipLibCheck": true,
+		"esModuleInterop": true,
+		"allowSyntheticDefaultImports": true,
+		"sourceMap": true,
+		"baseUrl": ".",
+		"types": [],
+		"paths": {
+			"@/*": [
+				"src/*"
+			]
+		},
+		"lib": [
+			"esnext",
+			"dom",
+			"dom.iterable",
+			"scripthost"
+		]
+	},
+	"include": [
+		"src/**/*.ts",
+		"src/**/*.d.ts",
+		"src/**/*.vue",
+		"tests/**/*.ts",
+	],
+	"exclude": [
+		"node_modules"
+	]
+}