Add new images; update existing images; remove unused image files

[MongoCaleb]

Jira ticket: https://jira.mongodb.org/browse/DOCSP-40472

Staged Pages

• CPP
• DOTNET
• FLUTTER
• JAVA
• NODE
• KOTLIN
• REACT NATIVE

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[github-actions[bot]]

Readability for Commit Hash: 004416ac794ceda4e6c1e722e20f56f154f18d9b

You can see any previous Readability scores (if they exist) by looking at the comment's history.

Readability scores for changed documents:

• source/sdk/flutter: Grade Level: 9.5, Reading Ease: 50.02
• source/sdk/react-native: Grade Level: 10.9, Reading Ease: 40.95
• source/sdk/swift: Grade Level: 9.4, Reading Ease: 50.12
• source/sdk/kotlin: Grade Level: 9.2, Reading Ease: 50.63
• source/sdk/java: Grade Level: 9.1, Reading Ease: 51.04
• source/sdk/dotnet: Grade Level: 9.1, Reading Ease: 51.04
• source/sdk/node: Grade Level: 8.6, Reading Ease: 52.15
• source/sdk/cpp: Grade Level: 9.1, Reading Ease: 50.94

For Grade Level, aim for 8 or below.

For Reading Ease scores, aim for 60 or above:

Score	Difficulty
90-100	Very Easy
80-89	Easy
70-79	Fairly Easy
60-69	Medium
50-59	Fairly Hard
30-49	Hard
0-29	Very Hard

For help improving readability, try Hemingway App.

[MongoCaleb]

Closing for cleaner PR & branch: https://github.com/mongodb/docs-realm/pull/3319