Walk symbols when checking return types of function calls #132 (#133)

This change also adds more names to be excluded by the default min name
length check (e.g., `it`), although kinda tempted to turn this off by
default as its really only useful those super pedantic, as short names
can be readable.

It also now ignores unknown types instead of falling back to the
assumption that they're standard variables. I think this only happens if
a dependency/module isn't resolved or if things are a bit too compile
time. I'll need to look more into it at some point. Ignoring seems
better than giving a false positive to an issue.

Author: KurtWagner

integration_tests/test_cases/declaration_naming/regression_132.input.zig

@@ -0,0 +1,22 @@
+fn IntToFloatType(IntType: type) type {
+    return @Type(.{
+        .int = .{
+            .signedness = .signed,
+            .bits = @typeInfo(IntType).float.bits,
+        },
+    });
+}
+
+const GoodFloatType = IntToFloatType(u32);
+const badFloatType = IntToFloatType(u32);
+const bad_float_type = IntToFloatType(u32);
+
+const GoodInt = std.math.IntFittingRange(0, 10);
+const badInt = std.math.IntFittingRange(0, 10);
+const bad_int = std.math.IntFittingRange(0, 10);
+
+const GoodBitSet = std.StaticBitSet(10);
+const badBitSet = std.StaticBitSet(10);
+const bad_bit_set = std.StaticBitSet(10);
+
+const std = @import("std");

integration_tests/test_cases/declaration_naming/regression_132.lint_expected.stdout

@@ -0,0 +1,31 @@
+error Type declaration should be TitleCase [test_cases/declaration_naming/regression_132.input.zig:11:7] declaration_naming
+
+ 11 | const badFloatType = IntToFloatType(u32);
+    |       ^^^^^^^^^^^^
+
+error Type declaration should be TitleCase [test_cases/declaration_naming/regression_132.input.zig:12:7] declaration_naming
+
+ 12 | const bad_float_type = IntToFloatType(u32);
+    |       ^^^^^^^^^^^^^^
+
+error Type declaration should be TitleCase [test_cases/declaration_naming/regression_132.input.zig:15:7] declaration_naming
+
+ 15 | const badInt = std.math.IntFittingRange(0, 10);
+    |       ^^^^^^
+
+error Type declaration should be TitleCase [test_cases/declaration_naming/regression_132.input.zig:16:7] declaration_naming
+
+ 16 | const bad_int = std.math.IntFittingRange(0, 10);
+    |       ^^^^^^^
+
+error Type declaration should be TitleCase [test_cases/declaration_naming/regression_132.input.zig:19:7] declaration_naming
+
+ 19 | const badBitSet = std.StaticBitSet(10);
+    |       ^^^^^^^^^
+
+error Type declaration should be TitleCase [test_cases/declaration_naming/regression_132.input.zig:20:7] declaration_naming
+
+ 20 | const bad_bit_set = std.StaticBitSet(10);
+    |       ^^^^^^^^^^^
+
+x 6 errors