refactor(light-client): move the light client module into dash folder

[shotonoff]

Issue being fixed or feature implemented

IBC requires original TM original light-client to communicate with other compatible chains.
This PR is the first step of supporting IBC.

What was done?

Since, TD light-client is different from TM implementation. TD light-client moves into dash directory, where we keep the dash related implementations, to do not conflict with original one.

How Has This Been Tested?

Unit test / E2E tests

Breaking Changes

N/A

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[shotonoff]

It is not needed anymore