feat: add script bootstrap and script generate-metadata CLI commands (#3007)

* feat: add script bootstrap and script generate-metadata CLI commands

* Address PR comments on code

cli/bootstrap/common.ts

@@ -0,0 +1,24 @@
+
+export interface SchemaProperty {
+	type: string | undefined
+	description?: string
+	pattern?: string
+	default?: any
+	enum?: string[]
+	contentEncoding?: 'base64' | 'binary'
+	format?: string
+	items?: {
+		type?: 'string' | 'number' | 'bytes' | 'object'
+		contentEncoding?: 'base64'
+		enum?: string[]
+	}
+	min?: number
+	max?: number
+	currency?: string
+	currencyLocale?: string
+	multiselect?: boolean
+	customErrorMessage?: string
+	properties?: { [name: string]: SchemaProperty }
+	required?: string[]
+	showExpr?: string
+}

cli/bootstrap/flow_bootstrap.ts

@@ -0,0 +1,35 @@
+import { SchemaProperty } from "./common.ts";
+
+export interface FlowDefinition {
+    summary: string,
+    description: string,
+    value: {
+        modules: any[]
+    },
+    schema: {
+        $schema: string,
+        type: string,
+        order: string[],
+        properties: { [name: string]: SchemaProperty},
+        required: string[]
+    }
+    ws_error_handler_muted: false
+}
+
+export function defaultFlowDefinition(): FlowDefinition {
+    return {
+        summary: '',
+        description: '',
+        value: { 
+            modules: []
+        },
+        schema: {
+            $schema: 'https://json-schema.org/draft/2020-12/schema',
+            type: 'object',
+            order: [],
+            properties: {},
+            required: []
+        },
+        ws_error_handler_muted: false,
+    }
+}

cli/bootstrap/script_bootstrap.ts

@@ -0,0 +1,83 @@
+import { SchemaProperty } from "./common.ts";
+
+export interface ScriptMetadata {
+    summary: string,
+    description: string,
+    lock: string[],
+    is_template: boolean,
+    kind: string,
+    schema: {
+        $schema: string,
+        type: string,
+        properties: { [name: string]: SchemaProperty},
+        required: string[]
+    }
+}
+
+export function defaultScriptMetadata(): ScriptMetadata {
+    return {
+        summary: '',
+        description: '',
+        lock: [],
+        is_template: false,
+        kind: 'script',
+        schema: {
+            $schema: 'https://json-schema.org/draft/2020-12/schema',
+            type: 'object',
+            properties: {},
+            required: []
+        }
+    }
+}
+
+export const scriptBootstrapCode = {
+    python3: `def main():
+    return "Hello world"
+`,
+    
+    nativets: `export async function main() {
+    return "Hello world";
+}
+`,
+
+    bun: `export async function main() {
+  return "Hello world";
+}
+`,
+
+    deno: `export async function main() {
+  return "Hello world";
+}
+`,
+
+    go: `package inner
+func main() (interface{}, error) {
+    return "Hello world", nil
+}
+`,
+
+    mysql: `SELECT 'Hello world' AS message
+`,
+
+    bigquery: `SELECT 'Hello world' AS message
+`,
+
+    snowflake: `SELECT 'Hello world' AS message
+`,
+
+    mssql: `SELECT 'Hello world' AS message
+`,
+
+    graphql: `query() {
+    demo() {}
+}`,
+
+    postgresql: `SELECT 'Hello world' AS message
+`,
+
+    bash: `echo "Hello world"
+`,
+
+    powershell: `Write-Output "Hello world"`,
+
+}