feat: resolve file-local import namespaces

source/lexer/scan.hon

@@ -160,6 +160,14 @@ scan proc(
             cursor += width
             continue
         }
+        if (char == '.') {
+            try add_token(state, Token{
+                span = make_span(source, cursor, cursor + 1),
+                kind = .dot,
+            })
+            cursor += 1
+            continue
+        }
 
         if char == ':' {
             if cursor + 1 < program.len and program[cursor + 1] == ':' {

source/lexer/scan.test.hon

@@ -112,7 +112,7 @@ scans_ranges_without_consuming_float_dots test {
     expected [19]TokenKind :: [
         .int, .range, .int, .int, .range_inclusive, .int,
         .float, .range, .float, .pipe, .at, .ident, .comma, .ident, .pipe,
-        .range, .invalid, .invalid, .eof,
+        .range, .dot, .invalid, .eof,
     ]
     try testing.expect_equal(expected.len, state.tokens.items.len)
     for (expected) |kind, index| try testing.expect_equal(kind, state.tokens.items[index].kind)
@@ -120,7 +120,7 @@ scans_ranges_without_consuming_float_dots test {
     try testing.expect_equal(u32(3), state.tokens.items[1].span.end)
     try testing.expect_equal(u32(7), state.tokens.items[4].span.start)
     try testing.expect_equal(u32(10), state.tokens.items[4].span.end)
-    try testing.expect_equal(2, diagnostics.count(&diagnostic_store))
+    try testing.expect_equal(1, diagnostics.count(&diagnostic_store))
 }
 
 scans_array_delimiters_and_mut_keyword test {

source/lexer/token.hon

@@ -59,7 +59,7 @@ TokenKind :: enum {
     open_bracket, close_bracket
     open_curly, close_curly
 
-    comma
+    comma, dot
     colon
     newline