docs: update KLT intro page

[pragatisaikia]

Fixes : #1467 and #1540

• Restructured the text to include a dedicated section highlighting the three main use cases/features: Metrics, Observability, and Release lifecycle, incorporating relevant information from the Getting Started Guide.
• Replaced the previous YouTube links with the latest videos that cover the respective topics. Replaced the paragraph that referenced the December Community meeting with a new reference to a specific video: link to the video.

Files changed : link to the file

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[rakshitgondwal]

Just wondering why markdownlint is not throwing an error over here, seems like it is requiring some kind of approval.
Also thank you for the PR @pragatisaikia! Can you modify the pr name to docs: update into-klt.md, that would fix the Semantic PR Validation error.

[rakshitgondwal]

Also I'm not really sure that why do we need to shift to this from this for the comparison between Keptn V1 and the Keptn Lifecycle Toolkit. @StackScribe

[rakshitgondwal]

These changes would fix the markdownlint errors.

FYI @StackScribe @thisthat

[StackScribe]

In re: @rakshitgondwal 's question about what videos to use to explain the difference between Keptn v1 and KLT... I'm not completely sure what to do about video references in the docs. They are a great way to add more information and many people do enjoy the videos and voice more than reading the text but we are also going to have to pay attention and keep updating the videos we use because they get outdated -- I'm sure we'll figure it out in time. I think the presentation Andi made in Pakistan is the most coherent presentation we have about the evolution from Keptn v1 to KLT and was thinking that maybe the meeting minutes were a little "rough". But we could certainly add Andi's Pakistan video and leave the meeting minutes video. Are you saying that you like the presentation from the community meeting better than the Pakistan video? Everyone has a vote here -- feel free to comment the issue saying that you think removing the link to the meeting minutes is stupid and say why!

[rakshitgondwal]

In re: @rakshitgondwal 's question about what videos to use to explain the difference between Keptn v1 and KLT... I'm not completely sure what to do about video references in the docs. They are a great way to add more information and many people do enjoy the videos and voice more than reading the text but we are also going to have to pay attention and keep updating the videos we use because they get outdated -- I'm sure we'll figure it out in time. I think the presentation Andi made in Pakistan is the most coherent presentation we have about the evolution from Keptn v1 to KLT and was thinking that maybe the meeting minutes were a little "rough". But we could certainly add Andi's Pakistan video and leave the meeting minutes video. Are you saying that you like the presentation from the community meeting better than the Pakistan video? Everyone has a vote here -- feel free to comment the issue saying that you think removing the link to the meeting minutes is stupid and say why!

Yes! Actually, even me myself got to know about the difference between Keptn V1 and KLT from the meeting minutes video that's why I was more biased towards it. Just had one more question that the link for the KCD Pakistan video links to a specific timestamp of 2:50, so is this intentional or should we change the link?

[rakshitgondwal]

I was just looking at this video which is a talk by Giovanni and Brad in KubeCon EU 2023, and I think we can consider this for the difference between V1 and KLT too. wdyt @StackScribe

[agardnerIT]

LGTM

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