v0.9.0 GA

Added many docs and made a little adjustments.

What's Changed

• Add CAHNGELOG file by @Lemon73-Computing in #28
• Update: docs branch by @Lemon73-Computing in #34
• upgrade: nuget package version (8.0.0 -> 8.0.1) by @Lemon73-Computing in #36
• Revert "upgrade: nuget package version (8.0.0 -> 8.0.1)" by @Lemon73-Computing in #37
• Add documentation for developer by @Lemon73-Computing in #33
• Add documentations for contributor by @Lemon73-Computing in #40
• Android Color Fixed by @Lemon73-Computing in #41
• Change default fonts - Replace Open Sans with Noto Sans by @Lemon73-Computing in #42

Full Changelog: v0.9.0-rtm...v0.9.0