unictype/bidi*: Rename modules.

unictype/bidi*: Rename modules.

* modules/unictype/bidiclass-all: Renamed from
modules/unictype/bidicategory-all.
* modules/unictype/bidiclass-name: Renamed from
modules/unictype/bidiclass-name.
(Description): Update.
* modules/unictype/bidiclass-name-tests: Renamed from
modules/unictype/bidicategory-name-tests.
* modules/unictype/bidiclass-byname: Renamed from
modules/unictype/bidicategory-byname.
(Description): Update.
* modules/unictype/bidiclass-byname-tests: Renamed from
modules/unictype/bidicategory-byname-tests.
* modules/unictype/bidiclass-of: Renamed from
modules/unictype/bidicategory-of.
(Description): Update.
* modules/unictype/bidiclass-of-tests: Renamed from
modules/unictype/bidicategory-of-tests.
* modules/unictype/bidiclass-test: Renamed from
modules/unictype/bidicategory-test.
(Description): Update.
* modules/unictype/bidiclass-test-tests: Renamed from
modules/unictype/bidicategory-test-tests.
* modules/unictype/bidicategory-all: New file, a simple redirection.
* modules/unictype/bidicategory-name: Likewise.
* modules/unictype/bidicategory-byname: Likewise.
* modules/unictype/bidicategory-of: Likewise.
* modules/unictype/bidicategory-test: Likewise.
* modules/unictype/property-bidi-* (Dependencies): Update.
* lib/unictype/bidi_*.c: Update comment.