move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/gen/names_test.go

@@ -0,0 +1,91 @@
+package gen
+
+import "testing"
+
+func TestPascal(t *testing.T) {
+	tests := []struct {
+		name     string
+		expected string
+	}{
+		{
+			name:     "Id",
+			expected: "ID",
+		},
+		{
+			name:     "user_id",
+			expected: "UserID",
+		},
+		{
+			name:     "cdnConfig",
+			expected: "CDNConfig",
+		},
+		{
+			name:     "cdn_1_config",
+			expected: "CDN1Config",
+		},
+		{
+			name:     "p2pB2B",
+			expected: "P2PB2B",
+		},
+		{
+			name:     "md5Checksum",
+			expected: "MD5Checksum",
+		},
+		{
+			name:     "user_ids",
+			expected: "UserIDs",
+		},
+		{
+			name:     "UserIDs",
+			expected: "UserIDs",
+		},
+		{
+			name:     "tcpo_only",
+			expected: "TCPObfuscatedOnly",
+		},
+	}
+
+	for _, tt := range tests {
+		test := tt
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			res := pascal(test.name)
+			if res != test.expected {
+				t.Fatalf("mismatch; got: %s; expected: %s", res, test.expected)
+			}
+		})
+	}
+}
+
+func TestCamel(t *testing.T) {
+	tests := []struct {
+		name     string
+		expected string
+	}{
+		{
+			name:     "user_id",
+			expected: "userID",
+		},
+		{
+			name:     "full_name",
+			expected: "fullName",
+		},
+		{
+			name:     "full-admin",
+			expected: "fullAdmin",
+		},
+	}
+
+	for _, tt := range tests {
+		test := tt
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			res := camel(test.name)
+			if res != test.expected {
+				t.Fatalf("mismatch; got: %s; expected: %s", res, test.expected)
+			}
+		})
+	}
+}