Tests: Expanded linting test for lowercase name convention

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Signed-off-by: Ole Herman Schumacher Elgesem <ole@northern.tech>

Author: olehermanse

tests/lint/003_bundle_name_lowercase.cf

@@ -0,0 +1,16 @@
+bundle agent my_bundle
+{
+  reports:
+    "Hello";
+}
+
+body perms my_body
+{
+  owners => { "root" };
+}
+
+promise agent my_promise_type
+{
+  path => "/bin/true";
+  interpreter => "/bin/bash";
+}

tests/lint/003_bundle_name_lowercase.expected.txt

@@ -0,0 +1,16 @@
+
+bundle agent MyBundle
+             ^------^
+Convention: Bundle name should be lowercase at tests/lint/003_name_lowercase.x.cf:1:14
+
+
+body perms MyBody
+           ^----^
+Convention: Body name should be lowercase at tests/lint/003_name_lowercase.x.cf:7:12
+
+
+promise agent MyPromiseType
+              ^-----------^
+Convention: Promise type should be lowercase at tests/lint/003_name_lowercase.x.cf:12:15
+FAIL: tests/lint/003_name_lowercase.x.cf (3 errors)
+Failure, 3 errors in total.

tests/lint/003_bundle_name_lowercase.x.cf

@@ -0,0 +1,16 @@
+bundle agent MyBundle
+{
+  reports:
+    "Hello";
+}
+
+body perms MyBody
+{
+  owners => { "root" };
+}
+
+promise agent MyPromiseType
+{
+  path => "/bin/true";
+  interpreter => "/bin/bash";
+}