Editorial changes to readme.md and license.txt

[shawnalpay]

• Made small editorial changes and added links and more context in readme.md
• Deleted license.txt in favor of license.md

[jpradocueva]

Action Items from Members' call on Oct 31:

• [ ] [#621] Shawn @shawnalpay /Rob/ Joaquin @jpradocueva : Finalize and submit any additional minor adjustments before the next meeting.
• [ ] [#621] All members: Review the pull request and add comments or approvals by the next meeting to facilitate a smooth finalization of these updates.

[jpradocueva]

Approved during the Members' call on Nov 7.

[jpradocueva]

Action Items from Members' call on November 7:

• [ ] [#621] Joaquin: Merge the PR after final approval, ensuring the removal of license.txt and updates to readme.md are complete and accessible in the main branch.