docs: added migration guide redirect (and fixed other link issues). Fixed welcome page issue.

[unatasha8]

Changes

• Migration guide redirect: Added redirect rule in vercel.json to route /docs/migrate-to-ory to /docs/migrate-to-ory/migrate
• Broken links fixes: Updated documentation links across multiple guides (CLI, Hydra, Kratos, Keto, Polis) to remove outdated broken anchors and use correct paths
• TLS code samples removed: Removed "Fake TLS termination" and "Skip TLS verification" code examples from the Go self-hosted Hydra documentation (docs/hydra/self-hosted/05_go.mdx) as TLS is no longer supported

Checklist

• [ X] I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• [ X] I confirm that this pull request does not address a security vulnerability.
  If this pull request addresses a security vulnerability,
  I confirm that I got approval (please contact [email protected]) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

[wassimoo]

lgtm!

[vinckr]

2 small things

[vinckr]

thanks the link changes look good to me.
but I don't understand why the src/pages/index.tsx is needed? we already redirect from / to /welcome on prod - and I don't want to approve without understanding why it needs to be there

I would prefer if this extra dummy page is reverted and we just get this merged - if we need it you can still add it in a separate PR.

Also "TLS code samples removed" doesn't seem to be included here? but I think those should also be done in a separate PR.

The more granular the changes are in a PR the easier they are to review, the faster we can merge them and move on

[unatasha8]

thanks the link changes look good to me. but I don't understand why the src/pages/index.tsx is needed? we already redirect from / to /welcome on prod - and I don't want to approve without understanding why it needs to be there

I would prefer if this extra dummy page is reverted and we just get this merged - if we need it you can still add it in a separate PR.
****From 'master' branch, can you test building the help in your local environment using 'npm run build' It does not generate a doc site with the Welcome page. It used to... I added src/pages/index.tsx to fix this.

Also "TLS code samples removed" doesn't seem to be included here? but I think those should also be done in a separate PR.
****The samples were removed from 'docs/hydra/self-hosted/05_go.mdx' which is included in this PR.

The more granular the changes are in a PR the easier they are to review, the faster we can merge them and move on
***These changes are all related to broken links (even removing the TLS code samples).

[unatasha8]

removed src/pages/index.tsx