Updating standards for multiple changes

[prajectory]

1. Changing project to "digital public good"
2. Content > content collections
3. Defining functional open alternatives and clarifying the indicator on Platform Dependency
4. "Mechanism" word replaced by "policy" in one place and "must design for possibility of extracting"
5. Narrowing of "applicable laws" to "applicable privacy laws"

Need @Lucyeoh to review this as well as @lacabra since its kind of a major change given that so many minor changes are coming together. Thanks!

Fixes # .

Changes proposed in this pull request:

Propagation of Changes

Identify where of the following the proposed changes need to be propagated, and include the relevant pull request where appropriate:

• [x] The DPGA website contains https://digitalpublicgoods.net/standard/ which needs to be updated manually matching the contents of standard.md.
• [x] The DPGA website also contains the submission guide which needs to be updated manually.
• [ ] The unicef/publicgoods-candidates repository needs the following to be updated:
  • [x] the nominee-schema.json
  • [x] the screening-schema.json
  • [x] propagate any changes to all encoded nominees and digital public goods.
  • Link to the corresponding pull request: unicef/publicgoods-candidates#
• [x] The Submission Form through the unicef/publicgoods-submission repository, and its corresponding schema.js
  • Link to the corresponding pull request:
• [x] The Eligibility Form through the unicef/publicgoods-scripts repository, by editing quizQuestions.js
  • Link to the corresponding pull request: https://github.com/DPGAlliance/publicgoods-scripts/pull/102