DOC: Documentation updates for devtron installation, ingess, liveness and readiness probe

[Shubham9t9]

Description

Updates in documentation:

1. Added how we can see logs of devtron installer while installing devtron.
2. Added how we can apply liveness & readiness probes by executing commands.
3. Added pathType in ingress.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have tested it for all user roles

[arushi09-hub]

Please write proper description & Title of the PR

[prakarsh-dt]

Put this before paths field to remove confusion and what about the value of pathType:?
Example:

  hosts:
      - host: example1.com
        pathType: "ImplementationSpecific"
        paths:
            - /example

[prakarsh-dt]

Repeat all all places

[Shubham9t9]

done