[FIX] web: py_js: add "true"/"false" in context

Before this commit, py_js was unabled to evaluate expressions
containing "true" or "false" (boolean values, JS syntax), which
seems reasonnable for a python interpreter. However in Odoo, we
often use that syntax in modifiers (e.g. required="true"). For
that reason, we need to add those two keywords in the evaluation
context.

Part-of: odoo/odoo#87522

addons/web/static/src/core/py_js/py_builtin.js

@@ -58,4 +58,7 @@ export const BUILTINS = {
     },
 
     relativedelta: PyRelativeDelta,
+
+    true: true,
+    false: false,
 };

addons/web/static/tests/core/py_js/py_interpreter_tests.js

@@ -145,6 +145,11 @@ QUnit.module("py", {}, () => {
             }
         );
 
+        QUnit.test("true and false available in context", (assert) => {
+            assert.strictEqual(evaluateExpr("true"), true);
+            assert.strictEqual(evaluateExpr("false"), false);
+        });
+
         QUnit.test("throw error if name is not defined", (assert) => {
             assert.throws(() => evaluateExpr("a"));
         });