Add blog entry and release notes for Camel 4.0.0-RC1

content/blog/2023/06/RELEASE-4.0.0-RC1/index.md

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+---
+title: "RELEASE 4.0.0-RC1"
+date: 2023-06-03
+draft: false
+authors: [gzurowski]
+categories: ["Releases"]
+preview: "The Camel community announces the immediate availability of a new milestone Camel 4.0.0-RC1"
+---
+
+The Camel community announces the immediate availability of Camel 4.0.0-RC1, the third milestone towards a new 4.0.0 major release. It comes with 135 new features and improvements.
+
+The artifacts are published and ready for you to download from the Central Maven repository. For more details please take a look at the [release notes](/releases/release-4.0.0-RC1/).
+
+Many thanks to all who made this release possible.
+
+On behalf of the Camel PMC,  
+Gregor Zurowski

content/releases/release-4.0.0-RC1.md

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+---
+date: 2023-06-03
+draft: false
+type: release-note
+version: 4.0.0-RC1
+title: "Release 4.0.0-RC1"
+preview: "First release candidate for 4.0.0"
+apiBreaking: ""
+knownIssues: ""
+jiraVersionId: 12353103
+category: camel
+kind: RC
+jdk: [17]
+---
+
+This release is the first release candidate towards the Camel 4.0.0 release.