docs: Add more examples to Popular tasks (#4979)

Co-authored-by: Bryan Morgan <bryanmorgan@google.com>

README.md

@@ -142,6 +142,34 @@ Start by `cd`ing into an existing or newly-cloned repository and running `gemini
 > What security mechanisms are in place?
 ```
 
+```text
+> Provide a step-by-step dev onboarding doc for developers new to the codebase.
+```
+
+```text
+> Summarize this codebase and highlight the most interesting patterns or techniques I could learn from.
+```
+
+```text
+> Identify potential areas for improvement or refactoring in this codebase, highlighting parts that appear fragile, complex, or hard to maintain.
+```
+
+```text
+> Which parts of this codebase might be challenging to scale or debug?
+```
+
+```text
+> Generate a README section for the [module name] module explaining what it does and how to use it.
+```
+
+```text
+> What kind of error handling and logging strategies does the project use?
+```
+
+```text
+> Which tools, libraries, and dependencies are used in this project?
+```
+
 ### Work with your existing code
 
 ```text