Add tool usage scenarios

[harp-intel]

This pull request updates the tools/README.md file to provide a more comprehensive, user-friendly, and decision-oriented overview of available performance monitoring and profiling tools. The documentation now includes clearer tool descriptions, best-use scenarios, and a decision guide to help users select the right tool for their needs.

Documentation improvements:

• Expanded each tool's description to clarify its primary use cases, advantages, and best-fit scenarios.
• Added a "Choosing the Right Tool" section with a decision-tree format to help users quickly identify which tool to use based on their performance analysis goals.
• Grouped tools by typical user needs (e.g., quick assessment, deep optimization, cluster analysis, memory/bandwidth issues, GPU optimization, power monitoring, call stack visualization).
• Improved readability with thematic headings, bullet points, and emoji highlights for best-use cases and key advantages.

[napetrov]

It might be good to expand optimization-zone knowledge and recommendations beyond tools to libraries and brooder - how to run efficiently and performant on IA - https://context7.com/intel/optimization-zone?tab=benchmark
So this might be for example used for doc/context management for coding tools

[Copilot]

Pull request overview

Updates tools/README.md to provide a more decision-oriented reference for selecting performance monitoring and profiling tools in this repository.

Changes:

• Replaces the previous short tool summary list with structured “Intel® Tools Reference” and “Other Tools Reference” sections.
• Adds a “Choosing the Right Tool” decision guide organized by common performance investigation goals.
• Expands per-tool descriptions with “Best for” / advantage-focused guidance.

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[rsiyer-intel]

Looks great.

• For someone who is new to tools, may be we should have a difficulty/expertise level. Perfspect - easy to install, VTune - advanced - needs expertise, gprofiler - single node easy to start, multi-node - intermediate/expert level,

• baremetal vs cloud scenarios - recommended to use perfspect for quick insights in cloud environment, VTune/PCM etc depends on availability of PMU counters on cloud vendors.

[harp-intel]

Looks great.

• For someone who is new to tools, may be we should have a difficulty/expertise level. Perfspect - easy to install, VTune - advanced - needs expertise, gprofiler - single node easy to start, multi-node - intermediate/expert level,
• baremetal vs cloud scenarios - recommended to use perfspect for quick insights in cloud environment, VTune/PCM etc depends on availability of PMU counters on cloud vendors.

@rsiyer-intel Take a look at the updates.

[rsiyer-intel]

Summary tables look fantastic :) They make it visually very easy to comprehend. Thanks Jason!