feat: implement idx-cli MVP foundation, provider abstraction, and core quote/history commands

tests/cli.rs

@@ -0,0 +1,54 @@
+use assert_cmd::Command;
+use predicates::prelude::*;
+
+#[test]
+fn help_works() {
+    Command::cargo_bin("idx-cli")
+        .expect("binary exists")
+        .arg("--help")
+        .assert()
+        .success();
+}
+
+#[test]
+fn version_prints_cargo_version() {
+    Command::cargo_bin("idx-cli")
+        .expect("binary exists")
+        .arg("version")
+        .assert()
+        .success()
+        .stdout(predicate::str::contains(env!("CARGO_PKG_VERSION")));
+}
+
+#[test]
+fn quote_with_mock_provider_json() {
+    Command::cargo_bin("idx-cli")
+        .expect("binary exists")
+        .env("IDX_USE_MOCK_PROVIDER", "1")
+        .args(["-o", "json", "stocks", "quote", "BBCA,BBRI"])
+        .assert()
+        .success()
+        .stdout(predicate::str::contains("BBCA.JK"))
+        .stdout(predicate::str::contains("BBRI.JK"));
+}
+
+#[test]
+fn history_with_mock_provider_json() {
+    Command::cargo_bin("idx-cli")
+        .expect("binary exists")
+        .env("IDX_USE_MOCK_PROVIDER", "1")
+        .args([
+            "-o",
+            "json",
+            "stocks",
+            "history",
+            "BBCA",
+            "--period",
+            "3mo",
+            "--interval",
+            "1d",
+        ])
+        .assert()
+        .success()
+        .stdout(predicate::str::contains("2026-03-01"));
+}