Update banner taglines on CLI (#5464)

# Description of Changes
- Update banner taglines on CLI
```diff
- "Multiplayer at the speed of light"
+ "Development at the speed of light"
```

# Screenshots
- Before

<img width="763" height="214" alt="screenshot2"
src="https://github.com/user-attachments/assets/73b636ef-bfa3-4a5c-8c9b-8ba589a22101"
/>

- After

<img width="758" height="214" alt="screenshot1"
src="https://github.com/user-attachments/assets/15037d83-29ea-45ea-9581-8bede5f944ac"
/>


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# API and ABI breaking changes

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corresponding GitHub label. -->

# Expected complexity level and risk
1

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# Testing

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Author: clockwork-tien

crates/cli/src/main.rs

@@ -115,7 +115,7 @@ fn get_command() -> Command {
 │            888                                                                                        │
 │            888                                                                                        │
 │            888                                                                                        │
-│                                  "Multiplayer at the speed of light"                                  │
+│                                  "Development at the speed of light"                                  │
 │                                                                                                       │
 ├───────────────────────────────────────────────────────────────────────────────────────────────────────┤
 │ SpacetimeDB Command Line Tool                                                                         │

crates/standalone/src/subcommands/start.rs

@@ -496,7 +496,7 @@ fn banner() {
 │            888                                                                                        │
 │            888                                                                                        │
 │            888                                                                                        │
-│                                  "Multiplayer at the speed of light"                                  │
+│                                  "Development at the speed of light"                                  │
 └───────────────────────────────────────────────────────────────────────────────────────────────────────┘
     "#
     )