Removed expired links and added example apps

[usama9500]

• Added two examples (Web App and Website)
• Removed old SDK references

[changeset-bot]

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Latest commit: b6eeaea

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The package or glob expression "website" is specified in the `ignore` option but it is not found in the project. You may have misspelled the package name or provided an invalid glob expression. Note that glob expressions must be defined according to https://www.npmjs.com/package/micromatch.
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[ashuvssut]

are there any gitbook changes?

[usama9500]

are there any gitbook changes?

No changes on gitbook. This PR is for readme file. For gitbook, I will add new pages for SDK reference directly.