Local queries (#641)

* Read local queries from pgweb home directory
* Refactor local query functionality
* Allow picking local query in the query tab
* WIP
* Disable local query dropdown during execution
* Only allow local queries running in a single session mode
* Add middleware to enforce local query endpoint availability
* Fix query check
* Add query store tests
* Make query store errors portable
* Skip building specific tests on windows

pkg/client/client_test.go

@@ -660,6 +660,15 @@ func testTablesStats(t *testing.T) {
 	assert.Equal(t, columns, result.Columns)
 }
 
+func testConnContext(t *testing.T) {
+	result, err := testClient.GetConnContext()
+	assert.NoError(t, err)
+	assert.Equal(t, "localhost", result.Host)
+	assert.Equal(t, "postgres", result.User)
+	assert.Equal(t, "booktown", result.Database)
+	assert.Equal(t, "default", result.Mode)
+}
+
 func TestAll(t *testing.T) {
 	if onWindows() {
 		t.Log("Unit testing on Windows platform is not supported.")
@@ -698,6 +707,7 @@ func TestAll(t *testing.T) {
 	testReadOnlyMode(t)
 	testDumpExport(t)
 	testTablesStats(t)
+	testConnContext(t)
 
 	teardownClient()
 	teardown(t, true)