Update branding assets and README for Omoo Lab

- Revamped README.md to reflect new branding and mission statement.
- Added new cover image (Cover.zh.png) and various logo formats (Logo.bbg.h.png, Logo.bbg.png, Logo.bo.h.png, Logo.bo.png, Logo.h.png, Logo.h.svg, Logo.wbg.h.png, Logo.wbg.png, Logo.wo.h.png, Logo.wo.png).
- Removed obsolete BASE.base file and branding README.md.
- Introduced new watermarker images (Watermarker.34.png, Watermarker.43.png, Watermarker.h.43.png).

contents/branding/BASE.base

@@ -1,12 +0,0 @@
-formulas:
-  cover: file
-views:
-  - type: cards
-    name: Table
-    filters:
-      and:
-        - file.inFolder("contents/branding")
-    order:
-      - file.name
-      - formula.cover
-    image: formula.cover

contents/branding/README.md

@@ -1,2 +0,0 @@
-一些 logo、水印的资源
-