chore: migrate to pnpm workspaces monorepo with Turborepo

- Restructure directories: apps/api, apps/admin, apps/website
- Add root pnpm-workspace.yaml, turbo.json, .prettierrc, .gitignore
- Rename packages to @inkreach/api, @inkreach/admin, @inkreach/website
- Add shared packages: packages/tsconfig, packages/shared-types
- Add pnpm.onlyBuiltDependencies for native builds
- Update docs: README.md, structs.md
- All three projects build successfully

packages/tsconfig/api.json

@@ -0,0 +1,20 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./base.json",
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "ES2021",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "removeComments": true,
+    "strictNullChecks": true,
+    "noImplicitAny": true,
+    "strictBindCallApply": true,
+    "outDir": "./dist",
+    "baseUrl": "./",
+    "incremental": true,
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  }
+}

packages/tsconfig/base.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "declaration": true,
+    "sourceMap": true,
+    "noFallthroughCasesInSwitch": true
+  }
+}

packages/tsconfig/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "@inkreach/tsconfig",
+  "version": "0.0.0",
+  "private": true,
+  "files": ["base.json", "api.json", "vue.json"]
+}

packages/tsconfig/vue.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./base.json",
+  "compilerOptions": {
+    "jsx": "preserve",
+    "types": ["vite/client", "node"],
+    "baseUrl": ".",
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  }
+}