Update copilot instructions and prompts (#35443)

Author: praveenkuttappan

.github/copilot-instructions.md

@@ -156,6 +156,7 @@ from the list of paths. If user does not have a TypeSpec project, then prompt us
 
 ### Pre-requisites
 - User should have a GitHub account and should be logged in to GitHub account using GitHub CLI `gh auth login`.
+- run `npm ci` to install the dependencies
 
 
 ### Basic Rules for SDK Generation from TypeSpec

.github/prompts/create-release-plan.prompt.md

@@ -4,7 +4,7 @@ tools: ['CreateReleasePlan', 'GetReleasePlanForPullRequest', 'GetReleasePlan', '
 ---
 
 # Release Plan Creation Process
-
+You goal is to create a valid release plan. You must prompt user to provide all required information and all input must match the format and requirement mentioned in step 3 below.
 Follow these steps in order to create or manage a release plan for an API specification pull request:
 
 ## Step 1: Validate Prerequisites
@@ -30,7 +30,7 @@ If any details are missing, prompt the user accordingly:
     - GA (Generally Available)
 - **Service Tree ID**: GUID format identifier for the service in Service Tree. Before creating release plan, always show the value to user and ask them to confirm it's a valid value in service tree.
 - **Product Service Tree ID**: GUID format identifier for the product in Service Tree. Before creating release plan, always show the value to user and ask them to confirm it's a valid value in service tree.
-- **Expected Release Timeline**: Format as "Month YYYY" (e.g., "March 2024")
+- **Expected Release Timeline**: Format must be in "Month YYYY"
 - **API Version**: The version of the API being released
 - **SDK Release Type**: Value must be beta or stable.
     - "beta" for preview API versions

.github/prompts/typespec-to-sdk.prompt.md

@@ -103,7 +103,8 @@ Your goal is to guide user through the process of generating SDKs from TypeSpec
 1. Run `/create-release-plan`
 2. If SDK PRs exist, link them to the release plan
 3. Run `/sdk-details-in-release-plan` to add languages and package names to the release plan
-4. If TypeSpec project is for management plane, Run `/verify-namespace-approval` to check package namespace approval
+4. If TypeSpec project is for management plane, Run `/verify-namespace-approval` to check package namespace approval.
+This step should not check package readiness to verify namespace approval for management plane SDK.
 5. Run `/run-sdk-gen-pipeline` with the spec PR
 6. Monitor pipeline status and provide updates
 7. Display generated SDK PR links when available