[DOC] Restructure / Refine new profiling docs

[Rperry2174]

In #2747 I merged things in a little bit of a "halfway" state.

@knylander-grafana had some recommendations about reorganizing but I didn't want the PR to go stale and also wanted to see what it looked like in the sidebar before reshuffling things around

The three files in question are

• docs/sources/why-use-continuous-profiling/_index.md
• docs/sources/analyzing-profiles-in-pyroscope-ui/_index.md
• docs/sources/profiling-types-in-pyroscope/_index.md

Related:

• Create "Ingest and analyze profile data" section in docs #2828: This PR adds the analyze and ingest data section and moves the analyze profiles in pyroscope and profiling types in pyroscope to this new folder

Tasks

Beta Give feedback

1. Write draft content (docs: Add why use continuous profiling docs #2747)
2. [DOC] Add an introduction to profiling page #2736
   type/docs +1
3. [DOC] Add a new page that explains profile types #2737
   type/docs +1
   
4. [DOC] Document use cases for Pyroscope and profiling - why would someone want to use it? #2770
   type/docs +1
   
5. [DOC] Add doc to explain how someone uses Pyrocope #2776
   type/docs +1
   

[knylander-grafana]

@Rperry2174 I'll tackle this issue during the sprint next week.

[knylander-grafana]

Related: #2828

[knylander-grafana]

PR for some of this content: #2839